Colonel William A. Phillips

The United States Senate is the upper chamber of the United States Congress. Senators have been directly elected by state-wide popular vote since the Seventeenth Amendment to the United States Constitution in 1913. A senate term is six years with no term limit. Every two years a third of the seats are up for election. Some years also have a few special elections to fill vacancies. Each state has two senators elected in different years. There were 96 senators from 1912 to 1960 and 100 since then. The Senate has been dominated by Democrats (D) and Republicans (R) in the whole period.

Key

Key
C_#	Conservative
D_#	Democratic
FL_#	Farmer–Labor
I_#	Independent
ID_#	Independent Democratic
P_#	Progressive
R_#	Republican
V_#	Vacant

Seats on election are shown in bold.
Re-elected: The sitting senator is elected for another term.
Hold: A new candidate from the same party is elected.
Gain: The party did not have the seat before.

Consider for example the Democrats (D) in 1914:

36 sitting Democrats (D₁ to D₃₆) were not on election.
14 sitting Democrats (D₃₇ to D₅₀) were re-elected (D₅₀ had been appointed to fill a vacancy and is shown as an elected hold).
3 new Democrats (D₅₁ to D₅₃) held seats by replacing other Democrats.
3 new Democrats (D₅₄ to D₅₆) gained seats the Democrats did not have before.

1914

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈ Re-elected	D₃₇ Re-elected	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁	D₃₀	D₂₉
D₃₉ Re-elected	D₄₀ Re-elected	D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected
Majority →									D₄₉ Re-elected
R₃₉ Hold	P₁	D₅₆ Gain	D₅₅ Gain	D₅₄ Gain	D₅₃ Hold	D₅₂ Hold	D₅₁ Hold	D₅₀ Elected^[a] Hold	D₄₉ Re-elected
R₃₈ Hold	R₃₇ Hold	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected	R₃₀ Re-elected	R₂₉ Re-elected
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇ Re-elected	R₂₈ Re-elected
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1916

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈ Re-elected	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁	D₃₀	D₂₉
D₃₉ Re-elected	D₄₀ Re-elected	D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Hold	D₄₈ Hold
Majority →									D₄₉ Hold
R₃₉ Gain	R₄₀ Gain	R₄₁ Gain	R₄₂ Gain	D₅₄ Gain	D₅₃ Gain	D₅₂ Gain	D₅₁ Gain	D₅₀ Gain	D₄₉ Hold
R₃₈ Gain	R₃₇ Gain	R₃₆ Gain	R₃₅ Hold	R₃₄ Hold	R₃₃ Hold	R₃₂ Hold	R₃₁ Re-elected	R₃₀ Re-elected	R₂₉ Re-elected
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅ Re-elected	R₂₆ Re-elected	R₂₇ Re-elected	R₂₈ Re-elected
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1918

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂ Re-elected	D₃₁ Re-elected	D₃₀	D₂₉
D₃₉ Re-elected	D₄₀ Elected^[a]	D₄₁ Elected^[a]	D₄₂ Hold	D₄₃ Hold	D₄₄ Hold	D₄₅ Hold	D₄₆ Hold	D₄₇ Gain	R₄₉ Gain
Majority →									R₄₉ Gain
R₃₉ Hold	R₄₀ Hold	R₄₁ Hold	R₄₂ Hold	R₄₃ Gain	R₄₄ Gain	R₄₅ Gain	R₄₆ Gain	R₄₇ Gain	R₄₈ Gain
R₃₈ Hold	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected	R₃₀ Re-elected	R₂₉ Re-elected
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1920

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
R₅₉ Gain	D₃₇ Hold	D₃₆ Hold	D₃₅ Hold	D₃₄ Hold	D₃₃ Elected^[a]	D₃₂ Re-elected	D₃₁ Re-elected	D₃₀ Re-elected	D₂₉ Re-elected
R₅₈ Gain	R₅₇ Gain	R₅₆ Gain	R₅₅ Gain	R₅₄ Gain	R₅₃ Gain	R₅₂ Gain	R₅₁ Gain	R₅₀ Gain	R₄₉ Gain
Majority →									R₄₉ Gain
R₃₉ Re-elected	R₄₀ Re-elected	R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Re-elected	R₄₅ Re-elected	R₄₆ Hold	R₄₇ Hold	R₄₈ Hold
R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄	R₃₃	R₃₂	R₃₁	R₃₀	R₂₉
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1922

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁ Re-elected	D₂₂ Gain^[b] Re-elected	D₂₃ Re-elected	D₂₄ Hold	D₂₅Gain	D₂₆Gain	D₂₇ Gain	D₂₈ Hold
D₃₈ Re-elected	D₃₇ Hold	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂ Gain	D₃₁ Hold	D₃₀ Hold	D₂₉ Re-elected
D₃₉ Re-elected	D₄₀ Gain	D₄₁ Gain	D₄₂ Re-elected	FL₁ Gain	R₅₃ Gain	R₅₂ Gain	R₅₁ Hold	R₅₀ Hold	R₄₉ Hold
Majority →									R₄₉ Hold
R₃₉	R₄₀	R₄₁	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Re-elected	R₄₅ Re-elected	R₄₆ Re-elected	R₄₇ Elected^[a] Re-elected	R₄₈ Elected^[a]
R₃₈	R₃₇	R₃₆	R₃₅	R₃₄	R₃₃	R₃₂	R₃₁	R₃₀	R₂₉
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1924

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈ Hold	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂ Re-elected	D₃₁ Re-elected	D₃₀ Re-elected	D₂₉ Re-elected
D₃₉ Hold	D₄₀ Gain	FL₁	R₅₅ Gain	R₅₄ Gain	R₅₃ Gain	R₅₂ Gain	R₅₁ Gain	R₅₀ Hold	R₄₉ Hold
Majority →									R₄₉ Hold
R₃₉ Re-elected	R₄₀ Re-elected	R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Elected^[a] Re-elected	R₄₅ Elected Re-elected	R₄₆ Hold	R₄₇ Hold	R₄₈ Hold
R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃	R₃₂	R₃₁	R₃₀	R₂₉
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1926

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂	D₃₁	D₃₀	D₂₉
D₃₉ Hold	D₄₀ Gain	D₄₁ Gain	D₄₂ Gain	D₄₃ Gain	D₄₄ Gain	D₄₅ Gain	FL₁	R₅₀ Ran	R₄₉ Hold
Majority →									R₄₉ Hold
R₃₉ Re-elected	R₄₀ Re-elected	R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Re-elected	R₄₅ Hold	R₄₆ Hold	R₄₇ Hold	R₄₈ Hold
R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁	R₃₀	R₂₉
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1928

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈ Re-elected
D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂ Re-elected	D₃₁ Re-elected	D₃₀ Re-elected	D₂₉ Re-elected
D₃₉ Re-elected	D₄₀ Hold	FL₁ Re-elected	V₁	V₂	R₅₃ Gain	R₅₂ Gain	R₅₁ Gain	R₅₀ Gain	R₄₉ Gain
Majority →									R₄₈ Gain
R₃₉ Re-elected	R₄₀ Re-elected	R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Re-elected	R₄₅ Elected	R₄₆ Elected	R₄₇ Hold	R₄₈ Gain
R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅	R₃₄	R₃₃	R₃₂	R₃₁	R₃₀	R₂₉
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1930

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇ Re-elected	D₂₈ Re-elected
D₃₈ Hold	D₃₇ Hold	D₃₆ Hold	D₃₅ Hold	D₃₄ Hold	D₃₃ Re-elected	D₃₂ Re-elected	D₃₁ Re-elected	D₃₀ Re-elected	D₂₉ Re-elected
D₃₉ Gain	D₄₀ Gain	D₄₁ Gain	D₄₂ Gain	D₄₃ Gain	D₄₄ Gain	D₄₅ Gain	FL₁	R₅₀ Gain	R₄₉ Hold
Majority →									R₄₉ Hold
R₃₉ Re-elected	R₄₀ Re-elected	R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Re-elected	R₄₅ Re-elected	R₄₆ Re-elected	R₄₇ Hold	R₄₈ Hold
R₃₈ Re-elected	R₃₇	R₃₆	R₃₅	R₃₄	R₃₃	R₃₂	R₃₁	R₃₀	R₂₉
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1932

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂ Re-elected	D₃₁	D₃₀	D₂₉
D₃₉ Re-elected	D₄₀ Re-elected	D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Hold	D₄₆ Hold	D₄₇ Hold	D₄₈ Gain
Majority →									D₄₉ Gain
D₅₈ Gain	D₅₇ Gain	D₅₆ Gain	D₅₅ Gain	D₅₄ Gain	D₅₃ Gain	D₅₂ Gain	D₅₁ Gain	D₅₀ Gain	D₄₉ Gain
D₅₉ Gain	FL₁	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁	R₃₀	R₂₉
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1934

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁	D₃₀	D₂₉
D₃₉	D₄₀	D₄₁	D₄₂	D₄₃	D₄₄	D₄₅	D₄₅	D₄₇ Re-elected	D₄₈ Re-elected
Majority →									D₄₉ Re-elected
D₅₈ Hold	D₅₇ Re-elected	D₅₆ Re-elected	D₅₅ Re-elected	D₅₄ Re-elected	D₅₃ Re-elected	D₅₂ Re-elected	D₅₁ Re-elected	D₅₀ Re-elected	D₄₉ Re-elected
D₅₉ Hold	D₆₀ Hold	D₆₁ Gain	D₆₂ Gain	D₆₃ Gain	D₆₄ Gain	D₆₅ Gain	D₆₆ Gain	D₆₇ Gain	D₆₈ Gain
R₁₉ Re-elected	R₂₀ Re-elected	R₂₁ Re-elected	R₂₂ Re-elected	R₂₃ Re-elected	R₂₄ Re-elected	R₂₅ Re-elected	P₁ Re-elected new party	FL₁ Re-elected	D₆₉ Gain
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1936

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁	D₃₀	D₂₉
D₃₉	D₄₀	D₄₁	D₄₂	D₄₃	D₄₄	D₄₅	D₄₅	D₄₆	D₄₇
Majority →									D₄₉
D₅₈ Re-elected	D₅₇ Re-elected	D₅₆ Re-elected	D₅₅ Re-elected	D₅₄ Re-elected	D₅₃ Re-elected	D₅₂ Re-elected	D₅₁ Re-elected	D₅₀	D₄₉
D₅₉ Re-elected	D₆₀ Re-elected	D₆₁ Re-elected	D₆₂ Re-elected	D₆₃ Re-elected	D₆₄ Re-elected	D₆₅ Re-elected	D₆₆ Hold	D₆₇ Hold	D₆₈ Hold
FL₁	FL₂ Hold	P₁	V₁	D₇₄ Gain	D₇₃ Gain	D₇₂ Gain	D₇₁ Gain	D₇₀ Gain	D₆₉ Gain
I₁ Re-elected new party	R₁₇ Gain	R₁₆ Hold	R₁₅ Re-elected	R₁₄ Re-elected	R₁₃ Re-elected	R₁₂ Re-elected	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1938

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁	D₃₀	D₂₉
D₃₉	D₄₀	D₄₁	D₄₂	D₄₃	D₄₄	D₄₅	D₄₆	D₄₇	D₄₈
Majority →									D₄₉ Re-elected
D₅₈ Re-elected	D₅₇ Hold	D₅₆ Re-elected	D₅₅ Re-elected	D₅₄ Re-elected	D₅₃ Re-elected	D₅₂ Hold	D₅₁ Re-elected	D₅₀ Re-elected	D₄₉ Re-elected
D₅₉ Re-elected	D₆₀ Re-elected	D₆₁ Re-elected	D₆₂ Re-elected	D₆₃ Re-elected	D₆₄ Re-elected	D₆₅ Re-elected	D₆₆ Re-elected	D₆₇ Re-elected	D₆₈ Hold
R₁₉ Gain	R₂₀ Gain	R₂₁ Gain	R₂₂ Gain	P₁	FL₁	FL₂	I₁	D₇₀ Re-elected	D₆₉ Re-elected
R₁₈ Gain	R₁₇ Gain	R₁₆ Gain	R₁₅ Re-elected	R₁₄ Re-elected	R₁₃ Re-elected	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1940

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁	D₃₀	D₂₉
D₃₉	D₄₀	D₄₁	D₄₂	D₄₃	D₄₄	D₄₅	D₄₆	D₄₇ Re-elected	D₄₈ Re-elected
Majority →									D₄₉ Re-elected
D₅₈ Re-elected	D₅₇ Re-elected	D₅₆ Re-elected	D₅₅ Re-elected	D₅₄ Re-elected	D₅₃ Re-elected	D₅₂ Re-elected	D₅₁ Re-elected	D₅₀ Re-elected	D₄₉ Re-elected
D₅₉ Re-elected	D₆₀ Re-elected	D₆₁ Re-elected	D₆₂ Re-elected	D₆₃ Hold	D₆₄ Hold	D₆₅ Hold	D₆₆ Hold	D₆₇ Gain	I₁
R₁₉ Re-elected	R₂₀ Re-elected	R₂₁ Re-elected	R₂₂ Hold	R₂₃ Hold	R₂₄ Gain	R₂₅ Gain	R₂₆ Gain	R₂₇ Gain	P₁ Re-elected
R₁₈ Re-elected	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1942

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁	D₃₀	D₂₉
D₃₉	D₄₀	D₄₁	D₄₂	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected
Majority →									D₄₉ Re-elected
P₁	D₅₇ Hold	D₅₆ Hold	D₅₅ Re-elected	D₅₄ Re-elected	D₅₃ Re-elected	D₅₂ Re-elected	D₅₁ Re-elected	D₅₀ Re-elected	D₄₉ Re-elected
R₃₈ Gain	R₃₇ Gain	R₃₆ Gain	R₃₅ Gain	R₃₄ Gain	R₃₃ Gain	R₃₂ Gain	R₃₁ Gain	R₃₀ Gain	R₂₉ Re-elected
R₁₉	R₂₀	R₂₁ Re-elected	R₂₂ Re-elected	R₂₃ Re-elected	R₂₄ Re-elected	R₂₅ Re-elected	R₂₆ Re-elected	R₂₇ Re-elected	R₂₈ Re-elected
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1944

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈ Re-elected	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁	D₃₀	D₂₉
D₃₉ Re-elected	D₄₀ Re-elected	D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected
Majority →									D₄₉ Re-elected
D₅₈ Gain	D₅₇ Gain	D₅₆ Gain	D₅₅ Hold	D₅₄ Hold	D₅₃ Hold	D₅₂ Hold	D₅₁ Hold	D₅₀ Re-elected	D₄₉ Re-elected
P₁	R₃₇ Gain	R₃₆ Gain	R₃₅ Gain	R₃₄ Hold	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected	R₃₀ Re-elected	R₂₉ Re-elected
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇ Re-elected	R₂₈ Re-elected
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1946

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁	D₃₀	D₂₉
D₃₉ Re-elected	D₄₀ Re-elected	D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Hold	D₄₅ Hold	D₄₆ Hold	R₅₀ Gain	R₄₉ Gain
Majority →									R₄₈ Gain
R₃₉ Hold	R₄₀ Gain	R₄₁ Gain	R₄₂ Gain	R₄₃ Gain	R₄₄ Gain	R₄₅ Gain	R₄₆ Gain	R₄₇ Gain	R₄₈ Gain
R₃₈ Hold	R₃₇ Hold	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected	R₃₀ Re-elected	R₂₉
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1948

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂ Re-elected	D₃₁	D₃₀	D₂₉
D₃₉ Re-elected	D₄₀ Re-elected	D₄₁ Re-elected	D₄₂ Hold	D₄₃ Hold	D₄₄ Hold	D₄₅ Hold	D₄₆ Gain	D₄₇ Gain	D₄₈ Gain
Majority →									D₄₉ Gain
R₃₉ Hold	R₄₀ Hold	R₄₁ Hold	R₄₂ Hold	D₅₄ Gain	D₅₃ Gain	D₅₂ Gain	D₅₁ Gain	D₅₀ Gain	D₄₉ Gain
R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃	R₃₂	R₃₁	R₃₀	R₂₉
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1950

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄	D₃₃	D₃₂	D₃₁	D₃₀	D₂₉
D₃₉ Re-elected	D₄₀ Re-elected	D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Hold	D₄₇ Hold	D₄₈ Hold
Majority →									D₄₉ Gain
R₃₉ Re-elected	R₄₀ Re-elected	R₄₁ Hold	R₄₂ Hold	R₄₃ Gain	R₄₄ Gain	R₄₅ Gain	R₄₆ Gain	R₄₇ Gain	D₄₉ Gain
R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected	R₃₀	R₂₉
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1952

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈ Re-elected	D₃₈ Re-elected	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁	D₃₀	D₂₉
D₃₉ Re-elected	D₄₀ Re-elected	D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Hold	D₄₄ Hold	D₄₅ Gain	D₄₆ Gain	D₄₇ Gain	D₄₈ Gain
Majority using VP's vote ↓
R₃₉ Re-elected	R₄₀ Re-elected	R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Hold	R₄₄ Gain	R₄₅ Gain	R₄₆ Gain	R₄₇ Gain	R₄₈ Gain
R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected	R₃₀ Re-elected	R₂₉ Re-elected
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1954

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇ Re-elected	D₂₈ Re-elected
D₃₈ Re-elected	D₃₇ Hold	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂ Re-elected	D₃₁ Re-elected	D₃₀ Re-elected	D₂₉ Re-elected
D₃₉ Re-elected	D₄₀ Re-elected	D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Hold	D₄₅ Gain	D₄₆ Gain	D₄₇ Gain	D₄₈ Gain
Plurality ↑
R₃₉ Re-elected	R₄₀ Re-elected	R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Hold	R₄₅ Hold	R₄₆ Gain	R₄₇ Gain	I₁
R₃₈ Re-elected	R₃₇	R₃₆	R₃₅	R₃₄	R₃₃	R₃₂	R₃₁	R₃₀	R₂₉
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1956

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄	D₃₃	D₃₂	D₃₁	D₃₀	D₂₉
D₃₉ Re-elected	D₄₀ Re-elected	D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Hold	D₄₈ Gain
Majority →									D₄₉ Gain
R₃₉ Re-elected	R₄₀ Re-elected	R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Gain	R₄₅ Gain	D₅₁ Gain	D₅₀ Gain	D₄₉ Gain
R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected	R₃₀	R₂₉
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1958

		D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈
D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁	D₁₀	D₉
D₁₉	D₂₀	D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈
D₃₈ Re-elected	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁	D₃₀	D₂₉
D₃₉ Re-elected	D₄₀ Re-elected	D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected
Majority →									D₄₉ Re-elected
D₅₈ Gain	D₅₇ Gain	D₅₆ Gain	D₅₅ Gain	D₅₄ Gain	D₅₃ Gain	D₅₂ Gain	D₅₁ Gain	D₅₀ Gain	D₄₉ Re-elected
D₅₉ Gain	D₆₀ Gain	D₆₁ Gain	R₃₅ Hold	R₃₄ Hold	R₃₃ Hold	R₃₂ Re-elected	R₃₁ Re-elected	R₃₀ Re-elected	R₂₉ Re-elected
R₁₉	R₂₀	R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈ Re-elected
R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁	R₁₀	R₉
		R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈

1960

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀	D₃₉	D₃₈	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁	D₄₂	D₄₃	D₄₄	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected	D₄₉ Re-elected	D₅₀ Re-elected
Majority →									D₅₁ Re-elected
D₆₀ Re-elected	D₅₉ Re-elected	D₅₈ Re-elected	D₅₇ Re-elected	D₅₆ Re-elected	D₅₅ Re-elected	D₅₄ Re-elected	D₅₃ Re-elected	D₅₂ Re-elected	D₅₁ Re-elected
D₆₁ Re-elected	D₆₂ Re-elected	D₆₃ Hold	D₆₄ Hold	R₃₆ Gain	R₃₅ Gain	R₃₄ Hold	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected
R₂₁	R₂₂	R₂₃	R₂₄ Re-elected	R₂₅ Re-elected	R₂₆ Re-elected	R₂₇ Re-elected	R₂₈ Re-elected	R₂₉ Re-elected	R₃₀ Re-elected
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1962

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀	D₃₉	D₃₈	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁	D₄₂	D₄₃	D₄₄	D₄₅	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected	D₄₉ Re-elected	D₅₀ Re-elected
Majority →									D₅₁ Re-elected
D₆₀ Re-elected	D₅₉ Re-elected	D₅₈ Re-elected	D₅₇ Re-elected	D₅₆ Re-elected	D₅₅ Re-elected	D₅₄ Re-elected	D₅₃ Re-elected	D₅₂ Re-elected	D₅₁ Re-elected
D₆₁ Re-elected	D₆₂ Re-elected	D₆₃ Hold	D₆₄ Gain	D₆₅ Gain	D₆₆ Gain	D₆₇ Gain	D₆₈ Gain	R₃₂ Gain	R₃₁ Re-elected
R₂₁	R₂₂ Re-elected	R₂₃ Re-elected	R₂₄ Re-elected	R₂₅ Re-elected	R₂₆ Re-elected	R₂₇ Re-elected	R₂₈ Re-elected	R₂₉ Re-elected	R₃₀ Re-elected
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1964

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀	D₃₉	D₃₈	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁	D₄₂	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected	D₄₉ Re-elected	D₅₀ Re-elected
Majority →									D₅₁ Re-elected
D₆₀ Re-elected	D₅₉ Re-elected	D₅₈ Re-elected	D₅₇ Re-elected	D₅₆ Re-elected	D₅₅ Re-elected	D₅₄ Re-elected	D₅₃ Re-elected	D₅₂ Re-elected	D₅₁ Re-elected
D₆₁ Re-elected	D₆₂ Re-elected	D₆₃ Re-elected	D₆₄ Re-elected	D₆₅ Re-elected	D₆₆ Gain	D₆₇ Gain	D₆₈ Gain	R₃₂ Gain	R₃₁ Hold
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆ Re-elected	R₂₇ Re-elected	R₂₈ Re-elected	R₂₉ Re-elected	R₃₀ Re-elected
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1966

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀	D₃₉	D₃₈	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁	D₄₂	D₄₃	D₄₄	D₄₅	D₄₆	D₄₇	D₄₈	D₄₉	D₅₀ Re-elected
Majority →									D₅₁ Re-elected
D₆₀ Re-elected	D₅₉ Re-elected	D₅₈ Re-elected	D₅₇ Re-elected	D₅₆ Re-elected	D₅₅ Re-elected	D₅₄ Re-elected	D₅₃ Re-elected	D₅₂ Re-elected	D₅₁ Re-elected
D₆₁ Re-elected	D₆₂ Re-elected	D₆₃ Re-elected	D₆₄ Hold	R₃₆ Gain	R₃₅ Gain	R₃₄ Gain	R₃₃ Hold	R₃₂ Hold	R₃₁ Re-elected
R₂₁ Re-elected	R₂₂ Re-elected	R₂₃ Re-elected	R₂₄ Re-elected	R₂₅ Re-elected	R₂₆ Re-elected	R₂₇ Re-elected	R₂₈ Re-elected	R₂₉ Re-elected	R₃₀ Re-elected
R₂₀ Re-elected	R₁₉ Re-elected	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1968

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀	D₃₉	D₃₈	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected	D₄₉ Re-elected	D₅₀ Re-elected
Majority →									D₅₁ Re-elected
R₄₁ Gain	R₄₂ Gain	D₅₈ Gain	D₅₇ Gain	D₅₆ Hold	D₅₅ Hold	D₅₄ Hold	D₅₃ Re-elected	D₅₂ Re-elected	D₅₁ Re-elected
R₄₀ Gain	R₃₉ Gain	R₃₈ Gain	R₃₇ Gain	R₃₆ Gain	R₃₅ Hold	R₃₄ Hold	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇ Re-elected	R₂₈ Re-elected	R₂₉ Re-elected	R₃₀ Re-elected
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1970

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected	D₄₉ Re-elected	D₅₀ Hold
Majority →									D₅₁ Hold
R₄₁ Hold	R₄₂ Gain	R₄₃ Gain	R₄₄ Gain	R₄₅ Gain	C₁ Gain	I₁ Re-elected new party	D₅₃ Gain	D₅₂ Hold	D₅₁ Hold
R₄₀ Re-elected	R₃₉ Re-elected	R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅	R₃₄	R₃₃	R₃₂	R₃₁
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1972

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀	D₃₉	D₃₈	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected	D₄₉ Hold	D₅₀ Hold
Majority →									D₅₁ Gain
R₄₁ Gain	R₄₂ Gain	C₁	I₁	D₅₆ Gain	D₅₅ Gain	D₅₄ Gain	D₅₃ Gain	D₅₂ Gain	D₅₁ Gain
R₄₀ Gain	R₃₉ Gain	R₃₈ Hold	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆ Re-elected	R₂₇ Re-elected	R₂₈ Re-elected	R₂₉ Re-elected	R₃₀ Re-elected
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1974

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected	D₄₉ Re-elected	D₅₀ Re-elected
Majority →									D₅₁ Re-elected
D₆₀ Gain	D₅₉ Gain	D₅₈ Gain	D₅₇ Hold	D₅₆ Hold	D₅₅ Hold	D₅₄ Hold	D₅₃ Re-elected	D₅₂ Re-elected	D₅₁ Re-elected
I₁	C₁	R₃₈ Gain	R₃₇ Hold	R₃₆ Hold	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈ Re-elected	R₂₉ Re-elected	R₃₀ Re-elected
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1976

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀	D₃₉	D₃₈	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected	D₄₉ Re-elected	D₅₀ Re-elected
Majority →									D₅₁ Re-elected
D₆₀ Gain	D₅₉ Gain	D₅₈ Gain	D₅₇ Gain	D₅₆ Gain	D₅₅ Gain	D₅₄ Hold	D₅₃ Hold	D₅₂ Re-elected	D₅₁ Re-elected
D₆₁ Gain	I₁ Re-elected	R₃₈ Gain	R₃₇ Gain	R₃₆ Gain	R₃₅ Gain	R₃₄ Gain	R₃₃ Gain	R₃₂ Gain	R₃₁ Hold
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈ Re-elected	R₂₉ Re-elected	R₃₀ Re-elected
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1978

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀	D₃₉	D₃₈	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁	D₄₂	D₄₃	D₄₄	D₄₅	D₄₆ Ran	D₄₇ Ran	D₄₈ Ran	D₄₉ Ran	D₅₀ Ran
Majority →									D₅₁ Ran
I₁	D₅₉ Gain	D₅₈ Gain	D₅₇ Gain	D₅₆ Gain	D₅₅ Gain	D₅₄ Hold	D₅₃ Hold	D₅₂ Hold	D₅₁ Ran
R₄₀ Gain	R₃₉ Gain	R₃₈ Gain	R₃₇ Gain	R₃₆ Gain	R₃₅ Gain	R₃₄ Gain	R₃₃ Hold	R₃₂ Hold	R₃₁ Hold
R₂₁	R₂₂ Ran	R₂₃ Ran	R₂₄ Ran	R₂₅ Ran	R₂₆ Ran	R₂₇ Ran	R₂₈ Ran	R₂₉ Ran	R₃₀ Ran
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1980

The November 4, 1980 elections coincided with Ronald Reagan's victory in the presidential election. Reagan's large margin of victory over incumbent Jimmy Carter pulled in many Democratic voters and gave a huge boost to Republican Senate candidates.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Hold	D₄₆ Hold	I₁	R₅₃ Gain	R₅₂ Gain	R₅₁ Gain
Majority →									R₅₁ Gain
R₄₁ Hold	R₄₂ Gain	R₄₃ Gain	R₄₄ Gain	R₄₅ Gain	R₄₆ Gain	R₄₇ Gain	R₄₈ Gain	R₄₉ Gain	R₅₀ Gain
R₄₀ Hold	R₃₉ Hold	R₃₈ Hold	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1982

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇ Re-elected	D₂₈ Re-elected	D₂₉ Re-elected	D₃₀ Re-elected
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂ Re-elected	D₃₁ Re-elected
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Gain	D₄₆ Gain	R₅₄ Gain	R₅₃ Gain	R₅₂ Hold	R₅₁ Re-elected
Majority →									R₅₁ Re-elected
R₄₁	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Re-elected	R₄₅ Re-elected	R₄₆ Re-elected	R₄₇ Re-elected	R₄₈ Re-elected	R₄₉ Re-elected	R₅₀ Re-elected
R₄₀	R₃₉	R₃₈	R₃₇	R₃₆	R₃₅	R₃₄	R₃₃	R₃₂	R₃₁
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1984

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂ Re-elected	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Hold	D₄₅ Hold	D₄₆ Gain	D₄₇ Gain	R₅₃ Gain	R₅₂ Hold	R₅₁ Re-elected
Majority →									R₅₁ Re-elected
R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Re-elected	R₄₅ Re-elected	R₄₆ Re-elected	R₄₇ Re-elected	R₄₈ Re-elected	R₄₉ Re-elected	R₅₀ Re-elected
R₄₀ Re-elected	R₃₉ Re-elected	R₃₈ Re-elected	R₃₇ Re-elected	R₃₆	R₃₅	R₃₄	R₃₃	R₃₂	R₃₁
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1986

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Hold	D₄₆ Hold	D₄₇ Gain	D₄₈ Gain	D₄₉ Gain	D₅₀ Gain
Majority →									D₅₁ Gain
R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Hold	R₄₅ Gain	D₅₅ Gain	D₅₄ Gain	D₅₃ Gain	D₅₂ Gain	D₅₁ Gain
R₄₀ Re-elected	R₃₉ Re-elected	R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀ Re-elected
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1988

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected	D₄₉ Re-elected	D₅₀ Re-elected
Majority →									D₅₁ Re-elected
R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Gain	R₄₄ Gain	R₄₅ Gain	D₅₅ Gain	D₅₄ Gain	D₅₃ Gain	D₅₂ Gain	D₅₁ Re-elected
R₄₀ Re-elected	R₃₉ Re-elected	R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1990

The elections were held November 6, 1990. Democrats increased their majority with a net gain of one seat from Republicans. The election took place in the middle of President George H. W. Bush's term, and, as with most other midterm elections, the party not holding the presidency gained seats in Congress. Only one seat changed parties in this election. Democrats would later gain a 57th seat after a Democrat was appointed to replace a Republican who had died.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Re-elected	D₃₉	D₃₈	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected	D₄₉ Re-elected	D₅₀ Re-elected
Majority →									D₅₁ Re-elected
R₄₁ Re-elected	R₄₂ Hold	R₄₃ Hold	R₄₄ Hold	D₅₆ Gain	D₅₅ Re-elected	D₅₄ Re-elected	D₅₃ Re-elected	D₅₂ Re-elected	D₅₁ Re-elected
R₄₀ Re-elected	R₃₉ Re-elected	R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉ Re-elected	R₃₀ Re-elected
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1992

The elections were held November 3, 1992 and coincided with Bill Clinton's victory the presidential election. Despite the presidential victory, Democrats had a net loss of a seat in the general elections, and only managed to break even by winning a seat in a special election.

Democratic victories over Republicans John F. Seymour (of California) and Bob Kasten (of Wisconsin) were cancelled out by the defeats of Democrats Wyche Fowler (of Georgia) and Terry Sanford (of North Carolina). The election of four new Democratic women to the Senate was notable (referred to in the press as the "Year of the Woman"). Due to a special election in California, both of California's Senate seats were up for election in 1992. These seats were won by Dianne Feinstein and Barbara Boxer. As a consequence, California became the first state to have elected women to occupy both of its Senate seats.

Democrat Carol Moseley Braun (of Illinois), became the first African-American woman in the United States Senate.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected	D₄₉ Hold	D₅₀ Hold
Majority →									D₅₁ Hold
R₄₁ Hold	R₄₂ Hold	R₄₃ Gain	D₅₇ Gain	D₅₆ Gain	D₅₅ Retired	D₅₄ Retired	D₅₃ Hold	D₅₂ Hold	D₅₁ Hold
R₄₀ Hold	R₃₉ Re-elected	R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀ Re-elected
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1994

The elections were held November 8, 1994. Republicans were able to take control of the Senate from the Democrats. In a midterm election, the opposition Republicans held the traditional advantage. Congressional Republicans campaigned against the early presidency of Bill Clinton, including his unsuccessful health care plan.^{[citation needed]}

The Republican Party successfully defended all of its seats and captured eight seats from the Democrats, including the seats of sitting Senators in Pennsylvania and Tennessee, as well as six open seats in Arizona, Maine, Michigan, Ohio, Oklahoma, and Tennessee. Notably, Tennessee's Senate delegation switched from entirely Democratic to entirely Republican in a single election. This election marked the first time Republicans controlled the Senate since January 1987, and coincided with the first change of control in the House of Representatives since January 1955 and a Republican net gain of ten governorships. Collectively, these Republican gains are known as the "Republican Revolution." This was also the first time since 1980 that Republicans made net gains in the Senate, but the last time the Republicans also made gains among class 1 senators.

Initially, the balance was 52–48 in favor of the Republicans, but after the power change, two Democrats switched parties, bringing the balance to 54–46.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Ran	D₃₉ Ran	D₃₈ Ran	D₃₇ Ran	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected	R₅₂ Re-elected	R₅₁ Re-elected
Majority →									R₅₁ Re-elected
R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Hold	R₄₅ Gain	R₄₆ Gain	R₄₇ Gain	R₄₈ Gain	R₄₉ Gain	R₅₀ Gain
R₄₀ Re-elected	R₃₉ Re-elected	R₃₈ Re-elected	R₃₇ Hold	R₃₆ Re-elected	R₃₅ Hold	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1996

The election was held November 5, 1996 and coincided with Democrat Bill Clinton's presidential re-election. Despite Clinton's re-election and his party picking up a net two seats in the House elections held the same day, the Republicans had a net gain of two seats in the Senate, following major Republican gains two years previously in the 1994 elections. As such, Clinton became the first president re-elected since Theodore Roosevelt in 1904 to win either of his terms without any Senate coattails. The Republicans captured open seats in Alabama, Arkansas, and Nebraska. In South Dakota, Democrat Tim Johnson narrowly defeated incumbent Republican Larry Pressler. The 1996 election marked the first time since 1980 that the Republican party made gains in the Senate for two consecutive election cycles.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Hold	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂	D₃₁
D₄₁ Hold	D₄₂ Hold	D₄₃ Hold	D₄₄ Hold	D₄₅ Gain	R₅₅ Gain	R₅₄ Gain	R₅₃ Hold	R₅₂ Hold	R₅₁ Hold
Majority →									R₅₁ Hold
R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Re-elected	R₄₅ Re-elected	R₄₆ Re-elected	R₄₇ Re-elected	R₄₈ Re-elected	R₄₉ Re-elected	R₅₀ Hold
R₄₀ Re-elected	R₃₉ Re-elected	R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅	R₃₄	R₃₃	R₃₂	R₃₁
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

1998

The November 3, 1998 elections were a roughly even contest between Republicans and Democrats. While the Democrats had to defend more seats up for election, Republican attacks on the morality of President Bill Clinton failed to connect with voters and anticipated Republican gains did not materialize. The Republicans picked up open seats in Ohio and Kentucky and narrowly defeated an incumbent senator in Illinois, but these were offset by the Democrats' gain of an open seat in Indiana and defeats of senators in New York and North Carolina. The balance of the Senate remained unchanged at 55–45 in favor of the Republicans. With Democrats gaining five seats in the House of Representatives, this marked the first time since 1934 that the out-of-Presidency party failed to gain congressional seats in a mid-term election, and the first time since 1822 that the party not in control of the White House failed to gain seats in the mid-term election of a President's second term. These are the last senate elections that resulted in no net change in the balance of power.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇ Re-elected	D₂₈ Re-elected	D₂₉ Re-elected	D₃₀ Re-elected
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂ Re-elected	D₃₁ Re-elected
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Gain	D₄₄ Gain	D₄₅ Gain	R₅₅ Gain	R₅₄ Gain	R₅₃ Gain	R₅₂ Re-elected	R₅₁ Re-elected
Majority →									R₅₁ Re-elected
R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Re-elected	R₄₅ Re-elected	R₄₆ Re-elected	R₄₇ Re-elected	R₄₈ Re-elected	R₄₉ Re-elected	R₅₀ Re-elected
R₄₀	R₃₉	R₃₈	R₃₇	R₃₆	R₃₅	R₃₄	R₃₃	R₃₂	R₃₁
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

2000

The November 7, 2000 elections coincided with the presidential election of Republican George W. Bush. It featured a number of fiercely contested elections that resulted in a victory for the Democrats, who gained a net total of four seats from Republicans. This election marked the first election year since 1988 where Democrats made net gains in the Senate.

These elections took place six years after Republicans had won a net gain of eight seats in Senate Class 1 during the elections of 1994. Democrats defeated Republican senators in Delaware, Michigan, Minnesota, Missouri, and Washington, as well as winning an open seat in Florida. In Missouri, the winner was elected posthumously. The Republicans did defeat one incumbent in Virginia and won an open seat in Nevada.

These elections resulted in an equal 50–50 split between Republicans and Democrats, meaning the Vice President would cast the tie-breaking votes in organizing the Senate. This resulted in the Democrats winning control of the Senate for only 17 days, since Al Gore was still Vice President and President of the Senate at the beginning of the new term, on January 3, 2001. But the Republicans regained control of the chamber when the new Vice President Dick Cheney was inaugurated January 20. The Republican majority would last until June 6, 2001 when a Republican Senator became an Independent and caucused with the Democrats.

These are the last elections with only Republicans and Democrats in the Senate. Starting with that Independent's party switch, there would always be at least one third-party senator.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Hold	D₄₃ Hold	D₄₄ Hold	D₄₅ Gain	D₄₆ Gain	D₄₇ Gain	D₄₈ Gain	D₄₉ Gain	D₅₀ Gain
Majority with Democratic Vice President→									D₅₀ Gain
R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Re-elected	R₄₅ Re-elected	R₄₆ Re-elected	R₄₇ Re-elected	R₄₈ Re-elected	R₄₉ Gain	R₅₀ Gain
R₄₀	R₃₉	R₃₈	R₃₇	R₃₆	R₃₅	R₃₄	R₃₃	R₃₂	R₃₁
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

2002

The November 5, 2002 elections were fiercely contested and resulted in a victory for the Republicans, who gained two seats and thus a narrow majority.

The Democrats had originally hoped to do well, as the party holding the presidency historically loses seats in midterm elections, and the Republicans had 20 seats up for election compared to 14 Democratic seats. In addition, four incumbent Republicans and no Democrats announced their retirement before the election. However, the Republicans were able to hold the four open seats, all of which were in the South. Ultimately, Republicans would pick up three seats and lose one, resulting in a net gain of two seats. Together with gains made in the House of Representatives, this election was one of the few mid-term elections in the last one hundred years in which the party in control of the White House gained Congressional seats (the others were 1902, 1934, and 1998). This was the first time since 1962 in which a first-term president's party made net gains in the Senate.

This was the most recent Senate election cycle in which at least one incumbent senator from each party lost in the general election. This was also the second consecutive mid-term election held in a president's first term in which the Republican party both had a net gain of seats and regained control of the United States Senate from the Democratic Party. This was the only election cycle ever where the party of the incumbent President gained new control of a house of Congress in a midterm election.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Hold	D₄₉ Gain	I₁
Majority with Republican Vice President→									R₅₀ Gain
R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Hold	R₄₅ Hold	R₄₆ Hold	R₄₇ Hold	R₄₈ Hold	R₄₉ Gain	R₅₀ Gain
R₄₀ Re-elected	R₃₉ Re-elected	R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀ Re-elected
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

2004

The November 2, 2004 coincided with the presidential re-election of George W. Bush and the United States House election. This was the third consecutive election for Senate Class 3 where the Democrats failed to end up with a net gain. This also marked the first time since 1980 in which a presidential candidate from either party won with coattails in the Senate.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀ Re-elected
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂ Re-elected	D₃₁ Re-elected
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Gain	D₄₄ Gain	I₁	R₅₅ Gain	R₅₄ Gain	R₅₃ Gain	R₅₂ Gain	R₅₁ Gain
Majority →									R₅₁ Gain
R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Re-elected	R₄₅ Re-elected	R₄₆ Re-elected	R₄₇ Re-elected	R₄₈ Re-elected	R₄₉ Hold	R₅₀ Gain
R₄₀ Re-elected	R₃₉ Re-elected	R₃₈ Re-elected	R₃₇ Re-elected	R₃₆	R₃₅	R₃₄	R₃₃	R₃₂	R₃₁
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

2006

The November 7, 2006 elections were part of the Democratic sweep of the 2006 elections, in which Democrats made numerous gains and no Congressional or gubernatorial seat held by a Democrat was won by a Republican.^[1] Six Republican incumbents were defeated by Democrats. An incumbent lost his Democratic primary, but created his own party and won re-election. Democrats kept their two open seats and Republicans held onto their lone open seat. An Independent was elected to replace an Independent.Two new women were elected to seats previously held by men. This brought the total number of female senators to an all-time high of 16. Following the elections, no party held a majority of seats for the first time since January 1955. The Democrats were able to control the chamber because the two Independents caucused with the Democrats. The Democrats needed at least 51 seats to control the Senate because Vice President Dick Cheney would have broken any 50–50 tie in favor of the Republicans.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈ Re-elected	D₂₉ Re-elected	D₃₀ Re-elected
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂ Re-elected	D₃₁ Re-elected
D₄₁ Re-elected	D₄₂ Hold	D₄₃ Hold	D₄₄ Gain	D₄₅ Gain	D₄₆ Gain	D₄₇ Gain	D₄₈ Gain	D₄₉ Gain	I₂ Re-elected New party
Majority (with Independents) ↑									I₁ Hold
R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Re-elected	R₄₅ Re-elected	R₄₆ Re-elected	R₄₇ Re-elected	R₄₈ Re-elected	R₄₉ Hold	I₁ Hold
R₄₀	R₃₉	R₃₈	R₃₇	R₃₆	R₃₅	R₃₄	R₃₃	R₃₂	R₃₁
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

2008

Going into the November 4, 2008 elections, the Senate had 49 Democrats, 49 Republicans, and 2 Independents who caucused with the Democrats, giving the Democratic caucus the slightest 51-49 majority.^[2] Of the seats up for election in 2008, 23 were held by Republicans and 12 by Democrats. The Republicans, who openly conceded early on that they wouldn't be able to regain the majority,^[3]^[4] lost eight seats. This election was the second cycle in a row in which no seats switched from Democratic to Republican. In addition, this was the largest Democratic Senate gain since 1986, when they also won eight seats. Finally, these elections marked the first time since 1964 in which a Democratic presidential candidate won the White House with Senate coattails.

When the new senators were first sworn in, the balance was 58–41 in favor of the Democrats, because of the unresolved Senate election in Minnesota. The April 2009 defection of a Republican to the Democratic party and the July 2009 resolution of the Minnesota election in favor of the Democrat increased the Democratic majority to 60–40. Republicans gained a seat in a January 2010 special election in Massachusetts, making the balance 59-41 before the start of the next election cycle.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected	D₄₉ Re-elected	D₅₀ Gain
Majority →									D₅₁ Gain
R₄₁ Hold	I₂	I₁	D₅₇ Gain	D₅₆ Gain	D₅₅ Gain	D₅₄ Gain	D₅₃ Gain	D₅₂ Gain	D₅₁ Gain
R₄₀ Hold	R₃₉ Re-elected	R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉ Re-elected	R₃₀ Re-elected
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

2010

The November 2, 2010 elections featured 19 incumbent Democrats (7 of whom retired or were defeated in the primary) and 18 incumbent Republicans (eight of whom retired or were defeated in the primary). Republicans won four seats held by retiring Democrats and Republicans defeated two incumbent Democrats, for a Republican net gain of six seats. This was the largest number of Republican net gains since the 1994 elections and also the first time since that election that Republicans successfully defended all of their own seats. This was the fourth consecutive election of "Class 3" senators where Democrats failed to gain seats and the third consecutive mid-term election held in a president's first term where Republicans picked up seats. Despite Republican gains, the Democrats retained a majority of the Senate with 51 seats plus 2 independents who caucused with them, compared to the 47 Republican seats.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀	D₃₉	D₃₈	D₃₇	D₃₆	D₃₅	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Re-elected	D₄₈ Re-elected	D₄₉ Re-elected	D₅₀ Hold
Majority →									D₅₁ Ran
R₄₁ Hold	R₄₂ Gain	R₄₃ Gain	R₄₄ Gain	R₄₅ Gain	R₄₆ Gain	R₄₇ Gain	I₂	I₁	D₅₁ Ran
R₄₀ Hold	R₃₉ Hold	R₃₈ Hold	R₃₇ Hold	R₃₆ Hold	R₃₅ Hold	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected
R₂₁	R₂₂	R₂₃ Re-elected	R₂₄ Re-elected	R₂₅ Re-elected	R₂₆ Re-elected	R₂₇ Re-elected	R₂₈ Re-elected	R₂₉ Re-elected	R₃₀ Re-elected
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

2012

In the November 6, 2012 elections, Democrats had 21 seats up for election, plus 1 Independent and 1 Independent Democrat (who both caucused with the Democrats), while the Republicans had only 10 seats up for election. The Democrats gained a net of 2 seats including a gain from the Independent Democrat, leaving them with a total of 53 seats. The Republicans lost a net of 2 seats, ending with a total of 45 seats. The Independent retained a lone seat and gained a seat from the Republicans, bringing their total to 2 seats. The Independents would caucus with the Democrats, so that majority caucus had a combined total of 55 seats. This was the third consecutive election of "Class 1" senators where Democrats gained seats. This was the third consecutive Senate election held in a presidential election year where the party belonging to the winning presidential candidate gained seats. This was the first time since 1936 where a Democratic presidential candidate who won a second term also had Senate coattails in both occasions (although Franklin Roosevelt won a third and fourth term in 1940 and 1944 respectively, he lost Senate seats on both occasions). This was the first time since 1964 in which either party had to defend more than two-thirds of the Senate seats up for grabs, but managed to make net gains.^[5]^[6]

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂ Re-elected	D₃₁ Re-elected
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Hold	D₄₇ Hold	D₄₈ Hold	D₄₉ Hold	D₅₀ Hold
Majority →									D₅₁ Gain
R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Hold	R₄₄ Hold	R₄₅ Gain	I₂ Gain	I₁ Re-elected	D₅₃ Gain	D₅₂ Gain	D₅₁ Gain
R₄₀ Re-elected	R₃₉ Re-elected	R₃₈ Re-elected	R₃₇	R₃₆	R₃₅	R₃₄	R₃₃	R₃₂	R₃₁
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

2014

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Hold	I₁	I₂	R₅₄ Gain	R₅₃ Gain	R₅₂ Gain	R₅₁ Gain
Majority →									R₅₁ Gain
R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Hold	R₄₄ Hold	R₄₅ Hold	R₄₆ Gain	R₄₇ Gain	R₄₈ Gain	R₄₉ Gain	R₅₀ Gain
R₄₀ Re-elected	R₃₉ Re-elected	R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

2016

The November 8, 2016 elections were held with the presidential election of Donald Trump. 34 seats were contested. Republicans held the Senate majority with 54 seats before this election. Democrats won a net gain of two seats. Only two incumbents lost their seats and 2016 marked the first time since 1986 that Democrats made a net gain of seats in class 3. This is the first and only election since the passage of the Seventeenth Amendment in 1913 where the winning party in every Senate election mirrored the winning party for their state in the presidential election.^[7]^[8] This election marks the first time since 2000 in which the party in opposition to the elected or re-elected presidential candidate made net gains in the Senate, with both cases being a Republican president and Democratic gains in the Senate. Also in both cases, the president won in the electoral college but lost the popular vote.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Hold	D₄₃ Hold	D₄₄ Hold	D₄₅ Gain	D₄₆ Gain	I₁	I₂	R₅₂ Hold	R₅₁ Hold
Majority →									R₅₁ Hold
R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Re-elected	R₄₅ Re-elected	R₄₆ Re-elected	R₄₇ Re-elected	R₄₈ Re-elected	R₄₉ Re-elected	R₅₀ Re-elected
R₄₀ Re-elected	R₃₉ Re-elected	R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

2018

Elections were held November 6, 2018, for all 33 Class 1 seats, along with two special elections for the Class 2 seats of Minnesota and Mississippi. Republicans expanded their majority, defeating four Democratic incumbents in Florida, Indiana, Missouri, and North Dakota. However, Democrats made gains in Arizona and Nevada, and defended competitive seats in states won by Donald Trump in the 2016 presidential election, such as Michigan, Montana, Ohio, and West Virginia, the latter of which was a major upset.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅ Re-elected	D₂₆ Re-elected	D₂₇ Re-elected	D₂₈ Re-elected	D₂₉ Re-elected	D₃₀ Re-elected
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃ Re-elected	D₃₂ Re-elected	D₃₁ Re-elected
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Gain	D₄₅ Gain	I₁ Re-elected	I₂ Re-elected	R₅₃ Gain	R₅₂ Gain	R₅₁ Gain
Majority →									R₅₁ Gain
R₄₁	R₄₂	R₄₃	R₄₄ Re-elected	R₄₅ Re-elected	R₄₆ Re-elected	R₄₇ Re-elected	R₄₈ Hold	R₄₉ Hold	R₅₀ Gain
R₄₀	R₃₉	R₃₈	R₃₇	R₃₆	R₃₅	R₃₄	R₃₃	R₃₂	R₃₁
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

2020

Elections were held November 3, 2020, with the 33 Class 2 seats being contested, along with special elections for the Class 3 seats of Arizona and Georgia. Democrats made gains in Arizona and Colorado, while Republicans flipped the Alabama seat that was lost to them in the 2017 special election. The two concurrent elections in Georgia were left to runoffs due to the state's two-round system, which were held on January 5, 2021. Control of the Senate was not known until these highly competitive elections were held, as neither party had gained a majority of seats after the elections. In the runoffs, Democrats gained both seats and thus narrow control of the Senate due to the election of Vice President Kamala Harris, who has the ability to cast tie-breaking votes.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄ Re-elected	D₃₃	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Hold	D₄₅ Gain	D₄₆ Gain	D₄₇ Gain	D₄₈ Gain	I₁	I₂
Majority (with independents and vice president)^[c] ↑									I₂
Majority (with independents and vice president)^[c] ↑									R₅₀ Gain
R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Re-elected	R₄₅ Re-elected	R₄₆ Re-elected	R₄₇ Hold	R₄₈ Hold	R₄₉ Hold	R₅₀ Gain
R₄₀ Re-elected	R₃₉ Re-elected	R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected
R₃₀	R₂₉	R₂₈	R₂₇	R₂₆	R₂₅	R₂₄	R₂₃	R₂₂	R₂₁
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

2022

Elections were held on November 8, 2022, with all 34 Class 3 seats up for election, along with a special election for Oklahoma's Class 2 seat. Democrats gained an open seat in Pennsylvania while retaining their 14 seats in this class, while Republicans held their remaining 20 seats. This was the first election since 2012 in which the Senate Democratic Caucus won an outright majority, and the first since 1990 in which only one seat changed party hands.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Re-elected	D₃₉ Re-elected	D₃₈ Re-elected	D₃₇ Re-elected	D₃₆ Re-elected	D₃₅ Re-elected	D₃₄	D₃₃	D₃₂	D₃₁
D₄₁ Re-elected	D₄₂ Re-elected	D₄₃ Re-elected	D₄₄ Re-elected	D₄₅ Re-elected	D₄₆ Re-elected	D₄₇ Elected	D₄₈ Hold	D₄₉ Gain	I₁
Majority (with independents)^[d] →									I₁
R₄₁ Re-elected	R₄₂ Re-elected	R₄₃ Re-elected	R₄₄ Re-elected	R₄₅ Hold	R₄₆ Hold	R₄₇ Hold	R₄₈ Hold	R₄₉ Hold	I₂
R₄₀ Re-elected	R₃₉ Re-elected	R₃₈ Re-elected	R₃₇ Re-elected	R₃₆ Re-elected	R₃₅ Re-elected	R₃₄ Re-elected	R₃₃ Re-elected	R₃₂ Re-elected	R₃₁ Re-elected
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀ Re-elected
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

2024

Elections will be held on November 5, 2024, with all 33 Class 1 seats up for election, along with a special election for Nebraska's Class 2 seat.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	TBD	TBD
TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD
TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD
Majority →									TBD
TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD
TBD	TBD	R₃₈	R₃₇	R₃₆	R₃₅	R₃₄	R₃₃	R₃₂	R₃₁
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

Notes

^ ^a ^b ^c ^d ^e ^f ^g Appointee elected
^ Appointee defeated
^ As the two independents senators (Angus King and Bernie Sanders) have caucused with the Democratic Party since joining the Senate, the Democratic caucus consists of 50 seats, which became a working majority once the presidency of Joe Biden began on January 20, with Vice President Kamala Harris casting tie-breaking votes.
^ As the two independent senators (Angus King and Bernie Sanders) have caucused with the Democratic Party since joining the Senate, the Democratic caucus consists of 51 seats.

References

^ Don Rose (December 26, 2006). "Democratic sweep may be long-lasting". Chicago Tribune. Retrieved April 9, 2014.
^ Sherman, Emily (October 8, 2008). "'Perfect storm' could give Dems 'magic 60' in Senate". CNN. Retrieved November 19, 2008.
^ Newton-Small, Jay (October 15, 2007). "The Republicans' Big Senate Fear". TIME. Archived from the original on October 16, 2007.
^ Hook, Janet (July 6, 2008). "Senate outlook bad for GOP". Los Angeles Times.
^ Weisman, Jonathan (November 6, 2012). "Democrats Keep Control of the Senate". The New York Times.
^ Bendavid, Naftali (November 6, 2012). "Democrats Retain Control of U.S. Senate". The Wall Street Journal.
^ "WaunaKeegan Results". WaunaKeegan. Archived from the original on March 22, 2017. Retrieved January 13, 2017.
^ Enten, Harry (November 10, 2016). "There Were No Purple* States On Tuesday". FiveThirtyEight.

[AE-1] ^ ^a ^b ^c ^d ^e ^f ^g Appointee elected

[AD-2] Appointee defeated

[11] As the two independents senators (Angus King and Bernie Sanders) have caucused with the Democratic Party since joining the Senate, the Democratic caucus consists of 50 seats, which became a working majority once the presidency of Joe Biden began on January 20, with Vice President Kamala Harris casting tie-breaking votes.

[12] As the two independent senators (Angus King and Bernie Sanders) have caucused with the Democratic Party since joining the Senate, the Democratic caucus consists of 51 seats.

[3] Don Rose (December 26, 2006). "Democratic sweep may be long-lasting". Chicago Tribune. Retrieved April 9, 2014.

[cnn-perfectstorm-4] Sherman, Emily (October 8, 2008). "'Perfect storm' could give Dems 'magic 60' in Senate". CNN. Retrieved November 19, 2008.

[5] Newton-Small, Jay (October 15, 2007). "The Republicans' Big Senate Fear". TIME. Archived from the original on October 16, 2007.

[6] Hook, Janet (July 6, 2008). "Senate outlook bad for GOP". Los Angeles Times.

[7] Weisman, Jonathan (November 6, 2012). "Democrats Keep Control of the Senate". The New York Times.

[8] Bendavid, Naftali (November 6, 2012). "Democrats Retain Control of U.S. Senate". The Wall Street Journal.

[9] "WaunaKeegan Results". WaunaKeegan. Archived from the original on March 22, 2017. Retrieved January 13, 2017.

[10] Enten, Harry (November 10, 2016). "There Were No Purple* States On Tuesday". FiveThirtyEight.

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[b]

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Key