Elections to the United States House of Representatives for the 109th Congress were held on November 2, 2004. The House of Representatives has 435 seats. It coincided with the reelection of President George W. Bush. In the 108th Congress, Republicans held 227 seats, Democrats held 205, with two Republican vacancies and one independent. As a result of this election, the 109th Congress began composed of 232 Republicans, 201 Democrats, one independent, and one vacancy. The Republicans thereby built up their House majority by 3 seats.
The 1986 United States Senate elections was an election for the United States Senate in the middle of Ronald Reagan's second presidential term. 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 and regaining control of the Senate for the first time since January 1981. The party not controlling the presidency gained seats, as usually occurs in mid-term elections.
The 1978 United States Senate elections in the middle of Democratic President Jimmy Carter's term. Thirteen seats changed hands between parties. The Democrats at first lost a net of two seats to the Republicans, and then one more in a special election. Democrats nevertheless retained a 58-41 majority.
The 1964 United States Senate elections coincided with the election of President Lyndon B. Johnson by an overwhelming majority, to a full term. His Democratic Party picked up a net two seats from the Republicans. As of 2019, this is the last time either party has had a two-thirds majority in the Senate, which would have hypothetically allowed the Senate Democrats to override a veto, convict and expel certain officials, or invoke cloture without any votes from Republicans. The Senate election coincided with Democratic gains in the House in the same year.
The 1960 United States Senate elections coincided with the election of John F. Kennedy as president. The Republicans gained one seat at the expense of the Democrats. The Democrats nonetheless retained a commanding lead in the Senate with 64 seats to 36. As Majority Leader Lyndon B. Johnson was elected Vice President, Mike Mansfield became the new Majority Leader.
The 1954 United States Senate elections was a midterm election in the first term of Dwight D. Eisenhower's presidency. 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 caucused with them.
The 1946 United States Senate elections were held November 5, 1946, in the middle of Democratic President Harry S. Truman's first term.
The United States Senate elections of 1944 coincided with the re-election of Franklin D. Roosevelt to his fourth term as President. The Democrats' large majority remained the same, but they lost one seat to the Republicans in a special election.
The United States Senate elections of 1940 coincided with the election of Franklin D. Roosevelt to his third term as President.
The United States Senate elections of 1938 occurred in the middle of Franklin D. Roosevelt's second term. This occurred six years after the Democratic landslide in the 1932 election, and so the opposition Republicans gained seven seats from the Democrats. However, the Democrats retained a commanding lead over the Republicans with more than two-thirds of the chamber.
The United States Senate elections of 1934 occurred in the middle of Democratic President Franklin D. Roosevelt's first term. In the middle of the Great Depression, voters strongly backed Roosevelt's New Deal and his allies in the Senate. The Democrats picked up a net of nine seats, giving them a supermajority. President Harry S. Truman was first elected to the U.S. Senate in the 1934 election. Truman would serve over a decade in the U.S. Senate, before becoming President Roosevelt's third Vice President, before succeeding to the presidency upon the death of President Roosevelt.
The United States Senate elections of 1932 coincided with Democrat Franklin D. Roosevelt's crushing defeat of incumbent Herbert Hoover in the presidential election. With the Hoover administration widely blamed for the Great Depression, Republicans lost twelve seats and control of the chamber.
The United States Senate elections of 1930 occurred in the middle of Republican President Herbert Hoover's term. With the Great Depression beginning to take hold, Republican incumbents became unpopular, and Democrats picked up a net of eight seats, erasing the Republican gains from the previous election cycle. Republicans retained control of the U.S. Senate since Vice President Charles Curtis cast the tie-breaking vote. This was the first of four consecutive Senate elections in the Depression in which Democrats made enormous gains, achieving a cumulative pick-up of 34 seats.
The United States Senate elections of 1928 were elections that coincided with the presidential election of Republican Herbert Hoover. The strong economy helped the Republicans to gain seven seats from the Democrats.
The United States Senate elections of 1922 were elections that occurred in the middle of Republican President Warren G. Harding's term. With the Republicans divided between conservative and progressive factions, the Democrats gained six net seats from the Republicans while the Farmer-Labor party gained one. The Republicans retained their Senate majority.
Elections to the United States House of Representatives for the 80th United States Congress took place in 1946. These midterm elections occurred 19 months after President Harry S. Truman assumed office upon the death of Franklin D. Roosevelt.
The 1938 United States House of Representatives elections was an election for the United States House of Representatives in 1938 which occurred in the middle of President Franklin D. Roosevelt's second term. Roosevelt's Democratic Party lost a net of 72 seats to the Republican Party, who also picked up seats from minor Progressive and Farmer-Labor Parties.
The 1936 United States House of Representatives elections was an election for the United States House of Representatives in 1936 which coincided with President Franklin D. Roosevelt's landslide re-election. Roosevelt's Democratic Party gained twelve more net seats from the Republican Party, bringing them above a three-fourths majority. This was the largest majority since Reconstruction. The last time a party won so decisively was in 1866.
The 1932 United States House of Representatives elections was an election for the United States House of Representatives in 1932 which coincided with the landslide election of President Franklin D. Roosevelt.
The Massachusetts United States Senate election of 1936 coincided with the landslide re-election of Democratic incumbent President Franklin D. Roosevelt over Republican candidate Alf Landon.
