The 1988 United States Senate elections were elections for the United States Senate. Held on November 8, the 33 seats of Class 1 were contested in regular elections. In spite of the Republican victory by George H. W. Bush in the presidential election, the Democrats gained a net of one seat in the Senate. Seven seats changed parties, with four incumbents being defeated. The Democratic majority in the Senate increased by one to 55–to–45.
The 1986 United States Senate elections were elections for the United States Senate. Held on November 4, in the middle of Ronald Reagan's second presidential term, the 34 seats of Class 3 were contested in regular elections. The Republicans had to defend an unusually large number of freshman Senate incumbents who had been elected on President Ronald Reagan's coattails in 1980. Democrats won a net of eight seats, defeating seven freshman incumbents, picking up two Republican-held open seats, and regaining control of the Senate for the first time since January 1981. This remains the most recent midterm election cycle in which the sitting president's party suffered net losses while still flipping a Senate seat.
The 1978 United States Senate elections were held on November 7, in the middle of Democratic President Jimmy Carter's term. The 33 seats of Class 2 were contested in regular elections. Special elections were also held to fill vacancies.
The 1958 United States Senate elections were elections for the United States Senate which occurred in the middle of President Dwight D. Eisenhower's second term. Thirty-two seats of Class 1 were contested in regular elections, the new state of Alaska held its first Senate elections for its Class 2 and 3 seats, and two special elections were held to fill vacancies.
The 1954 United States Senate elections was a midterm election in the first term of Dwight D. Eisenhower's presidency. The 32 Senate seats of Class 2 were contested in regular elections, and six special elections were held to fill vacancies. Eisenhower's Republican party lost a net of two seats to the Democratic opposition. This small change was just enough to give Democrats control of the chamber with the support of an Independent who agreed to caucus with them, he later officially joined the party in April 1955.
The 1952 United States Senate elections was an election for the United States Senate which coincided with the election of Dwight D. Eisenhower to the presidency by a large margin. The 32 Senate seats of Class 1 were contested in regular elections, and three special elections were held to fill vacancies. The Republicans took control of the Senate by managing to make a net gain of two seats. However, Wayne Morse (R-OR) became an independent forcing Republicans to rely on Vice President Richard Nixon's tie-breaking vote, although Republicans maintained a 48–47–1 plurality. Throughout the next Congress, Republicans were able to restore their 49–46–1 majority. This was the third time, as well as second consecutive, in which a sitting Senate leader lost his seat.
The 1946 United States Senate elections were held November 5, 1946, in the middle of Democratic President Harry S. Truman's first term after Roosevelt's passing. The 32 seats of Class 1 were contested in regular elections, and four special elections were held to fill vacancies. The Republicans took control of the Senate by picking up twelve seats, mostly from the Democrats. This was the first time since 1932 that the Republicans had held the Senate, recovering from a low of 16 seats following the 1936 Senate elections.
The 1938 United States Senate elections occurred in the middle of Franklin D. Roosevelt's second term. The 32 seats of Class 3 were contested in regular elections, and special elections were held to fill vacancies. The Republicans gained eight seats from the Democrats, though this occurred after multiple Democratic gains since the 1932 election, leading to the Democrats retaining a commanding lead over the Republicans with more than two-thirds of the legislative chamber.
The 1936 United States Senate elections coincided with the reelection of President Franklin D. Roosevelt. The 32 seats of Class 2 were contested in regular elections, and special elections were held to fill vacancies. The Great Depression continued and voters backed progressive candidates favoring Roosevelt's New Deal in races across the country. The Democrats gained 5 net seats during the election, and in combination with Democratic and Farmer–Labor interim appointments and the defection of George W. Norris from the Republican Party to become independent, the Republicans were reduced to 16 seats. Democrats gained a further two seats due to mid-term vacancies. The Democrats' 77 seats and their 62-seat majority remain their largest in history.
The 1934 United States Senate elections were held in the middle of Democratic President Franklin D. Roosevelt's first term. The 32 seats of Class 1 were contested in regular elections, and special elections were held to fill vacancies. During the Great Depression, voters strongly backed Roosevelt's New Deal and his allies in the Senate, with Democrats picking up a net of nine seats, giving them a supermajority. Republicans later lost three more seats due to mid-term vacancies ; however, a Democrat in Iowa died and the seat remained vacant until the next election. The Democrats entered the next election with a 70-22-2-1 majority.
The 1932 United States Senate elections coincided with Democrat Franklin D. Roosevelt's landslide victory over incumbent Herbert Hoover in the presidential election. The 32 seats of Class 3 were contested in regular elections, and special elections were held to fill vacancies.
The 1928 United States Senate elections were elections that coincided with the presidential election of Republican Herbert Hoover. The 32 seats of Class 1 were contested in regular elections, and special elections were held to fill vacancies. The strong economy helped the Republicans to gain seven seats from the Democrats.
The 1924 United States Senate elections were elections for the United States Senate which coincided with the election of Republican President Calvin Coolidge to a full term. The 32 seats of Class 2 were contested in regular elections, and special elections were held to fill vacancies. The strong economy and Coolidge's popularity helped Republican candidates increase their majority by three. Republicans would gain a further two seats through mid-term vacancies bringing their seat share to 56-39-1.
The 1910 United States House of Representatives elections were held for the most part on November 8, 1910, while Maine and Vermont held theirs early in September, in the middle of President William Howard Taft's term. Elections were held for all 391 seats of the United States House of Representatives, representing 46 states, to the 62nd United States Congress.
The 1908 United States House of Representatives elections were held for the most part on November 3, 1908, with Oregon, Maine, and Vermont holding theirs early in either June or September. They coincided with the 1908 United States presidential election, which William Howard Taft won. Elections were held for all 391 seats of the United States House of Representatives, representing 46 states, to serve in the 61st United States Congress.
The 1902 United States House of Representatives elections were held for the most part on November 4, 1902, with Oregon, Maine, and Vermont holding theirs early in either June or September. They occurred in the middle of President Theodore Roosevelt's first term, about a year after the assassination of President William McKinley in September 1901. Elections were held for 386 seats of the United States House of Representatives, representing 45 states, to serve in the 58th United States Congress.
The 1894 United States House of Representatives elections were held from June 4, 1894, to November 6, 1894, with special elections throughout the year. Elections were held to elect representatives from all 356 congressional districts across each of the 44 U.S. states at the time, as well as non-voting delegates from the inhabited U.S. territories. The winners of this election served in the 54th Congress, with seats apportioned among the states based on the 1890 United States census.
The 1884 United States House of Representatives elections were held for the most part on November 4, 1884, with four states holding theirs early between June and October. They coincided with the election of President Grover Cleveland. Elections were held for 325 seats of the United States House of Representatives, representing 38 states, to serve in the 49th United States Congress. Special elections were also held throughout the year.
The 1876–77 United States House of Representatives elections were held on various dates in various states between June 5, 1876, and March 13, 1877. Each state set its own date for its elections to the House of Representatives before the first session of the 45th United States Congress convened on October 15, 1877. The size of the House increased to 293 seats with the addition of the new state of Colorado.
The 1916 United States Senate elections were elections that coincided with the re-election of President Woodrow Wilson. This was the first election since the enactment of the Seventeenth Amendment that all 32 Class 1 Senators were selected by direct or popular elections instead of state legislatures. Republicans gained a net of two seats from the Democrats, and then a furthered seat through mid-term vacancies thereby reducing Democrats to a 53-43 majority.
