The 1950 United States Senate elections occurred in the middle of Harry S. Truman's second term as president. The 32 seats of Class 3 were contested in regular elections, and four special elections were held to fill vacancies. As with most 20th-century second-term midterms, the party not holding the presidency made significant gains. The Republican opposition made a net gain of five seats, taking advantage of the Democratic administration's declining popularity during the Cold War and the aftermath of the Recession of 1949. The Democrats held a narrow 49-to-47-seat majority after the election. This was the first time since 1932 that the Senate majority leader lost his seat, and the only instance of the majority leader losing his seat while his party retained the majority.
Results summary
Colored shading indicates party with largest share of that row.
Source: Clerk of the U.S. House of Representatives
Gains, losses, and holds
Retirements
One Republican and three Democrats retired instead of seeking re-election.
Defeats
Two Republicans and eight Democrats sought re-election but lost in the primary or general election.
Post election changes
Change in composition
Before the elections
Results of the elections
Race summaries
Special elections during the 81st Congress
In these special elections, the winners were seated during 1950 or before January 3, 1951; ordered by election date.
Races leading to the 82nd Congress
In these regular elections, the winner was seated on January 3, 1951; ordered by state.
All of the elections involved the Class 3 seats.
Closest races
Fifteen races had a margin of victory under 10%:
Alabama
Arizona
Incumbent Democratic U.S. senator Carl Hayden ran for re-election to a fifth term, defeating Republican nominee Bruce Brockett in the general election. Brockett was formerly the Republican nominee for governor in both 1946 and 1948. Hayden first defeated Cecil H. Miller and Robert E. Miller (of the Arizona Farm Bureau), for the Democratic nomination.
Arkansas
California
Colorado
Connecticut
Connecticut (special)
Connecticut (regular)
Florida
Democratic incumbent Senator Claude Pepper lost renomination May 2, 1950 to George A. Smathers, who easily won the general election.
The Democratic primary for the 1950 United States Senate election in Florida was described as the "most bitter and ugly campaigns in Florida political history." Ormund Powers, a Central Florida historian, noted that ABC and NBC commentator David Brinkley said that "the Peppers-Smathers campaign would always stand out in his mind as the dirtiest in the history of American politics". On January 12, 1950, U.S. Representative George A. Smathers declared his candidacy for the race in Orlando at Kemp's Coliseum, where about 3,000 supporters had gathered. In his opening speech, Smathers accused Pepper of being "the leader of the radicals and extremists", an advocate of treason, and a person against the constitutional rights of Americans. Ed Ball, a power in state politics who had broken with Claude Pepper, financed his opponent, Smathers.
Prior to the entry of Smathers and Pepper, Orlando attorney James G. Horrell campaigned for the seat. Horrell researched Pepper's weaknesses and the state's voters. Horrell also compiled a list of communist-front groups that Pepper had communicated with. On the day that Pepper declared his candidacy, Horrell withdrew and endorsed Smathers. Horrell also sent his reports about Pepper to Smathers, which he used throughout the next few months. This would also prevent the chance of a run-off election. In late February and early March, the Jacksonville Journal conducted a poll in 11 counties important for the election. Smathers led by about 2-to-1 and dominated in Duval, Pinellas, and Volusia counties, while he was also statistically tied with Pepper in Dade, Escambia, and Hillsborough counties. However, Smathers did not trail in any of the 11 counties.