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 1972 United States Senate elections were held on November 7, with the 33 seats of Class 2 contested in regular elections. They coincided with the landslide re-election of Republican President Richard Nixon. Despite Nixon's landslide victory, Democrats increased their majority by two seats. The Democrats picked up open seats in Kentucky and South Dakota, and defeated four incumbent senators: Gordon Allott of Colorado, J. Caleb Boggs of Delaware, Jack Miller of Iowa, and Margaret Chase Smith of Maine. The Republicans picked up open seats in New Mexico, North Carolina, and Oklahoma, and defeated one incumbent, William B. Spong Jr. of Virginia.
The 1964 United States Senate elections were held on November 3. The 33 seats of Class 1 were contested in regular elections. Special elections were also held to fill vacancies. They 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 2023, this was 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, propose constitutional amendments, or convict and expel certain officials without any votes from Senate Republicans. In practice, however, internal divisions effectively prevented the Democrats from doing so. The Senate election cycle coincided with Democratic gains in the House in the same year.
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 2006 United States House of Representatives elections in Colorado were held on November 7, 2006, with all seven House seats up for election. The winners served from January 3, 2007 to January 3, 2009.
The 1980 United States House of Representatives elections in South Carolina were held on November 4, 1980, to select six Representatives for two-year terms from the state of South Carolina. The primary elections for the Democrats and the Republicans were held on June 10 and the runoff elections were held two weeks later on June 24. Three incumbents were re-elected, but John Jenrette of the 6th congressional district was defeated in his bid for re-election and the open seat in the 1st congressional district was taken by the Republicans from the Democrats. The composition of the state delegation after the elections was four Republicans and two Democrats.
The 2004 United States Senate election in Colorado took place on November 2, 2004 alongside other elections to the United States Senate in other states as well as elections to the United States House of Representatives and various state and local elections. Incumbent Republican U.S. Senator Ben Nighthorse Campbell decided to retire instead of seeking a third term. Democratic nominee Ken Salazar won the open seat, defeating Republican nominee Pete Coors.
The 2016 United States House of Representatives elections in Colorado were held on November 8, 2016, to elect the seven U.S. representatives from the state of Colorado, one from each of the state's seven congressional districts. The elections coincided with the 2016 U.S. presidential election, as well as other elections to the House of Representatives, elections to the United States Senate and various state and local elections. The primaries were held on June 28.
The 1938 United States Senate election in Colorado took place on November 8, 1938. Incumbent Democratic Senator Alva B. Adams ran for re-election to a second term. Adams faced Denver attorney Archibald A. Lee, the Republican nominee, in the general election. Despite the nationwide Republican landslide, including Republicans' landslide victory in the gubernatorial election that year, Adams's popularity translated into an easy re-election campaign. Adams ended up defeating Lee with 58% of the vote. However, Adams did not end up fully serving his second term; he died on December 1, 1941.
The 1956 United States Senate special election in Colorado took place on November 6, 1956. Incumbent Republican Senator Eugene Millikin declined to seek re-election to a third term and a competitive election ensued. Former Congressman John A. Carroll, in his third consecutive bid for the Senate, narrowly defeated former U.S. Secretary of Agriculture Charles F. Brannan in the Democratic primary and advanced to the general election, where he faced Governor Dan Thornton, the Republican nominee. Despite Democratic presidential nominee Adlai Stevenson's poor performance in Colorado, state-level Democrats fared much better. Carroll ended up narrowly defeating Thornton, winning his only term in the U.S. Senate.
The 1944 United States Senate special election in Colorado took place on November 7, 1944. Incumbent Republican Senator Eugene Millikin, who was first appointed to fill Alva B. Adams's seat in 1941 and re-elected at the ensuing special election in 1942, ran for re-election to his first full term. In the general election, he faced wealthy Denver attorney Barney L. Whatley. Millikin benefited from the strong Republican performance in Colorado—Thomas E. Dewey and Governor John C. Vivian both won their respective elections by decisive margins—and cruised to a landslide victory over Whatley.
The 1942 United States Senate special election in Colorado took place on November 3, 1942. Democratic Senator Alva B. Adams died in office on December 1, 1941, and Republican Governor Ralph L. Carr appointed Denver oilman Eugene Millikin to fill the vacancy. Millikin ran for election for the remainder of Adams's term. He was opposed in the general election by James A. Marsh, the former chairman of the state Democratic Party. Aided in part by the nationwide Republican landslide, Millikin easily defeated Marsh to serve out the remainder of the term.
The 2018 United States House of Representatives elections in Colorado were held on November 6, 2018, to elect the seven U.S. representatives from the state of Colorado, one from each of the state's seven congressional districts. The Republican and Democratic Party primaries in Colorado were held on June 26, 2018. The elections coincided with the gubernatorial election, as well as other elections to the House of Representatives, elections to the United States Senate, and various state and local elections.
The 1914 United States Senate election in Colorado took place on November 3, 1914. It was the first direct U.S. Senate election in Colorado following the ratification of the Seventeenth Amendment. Incumbent U.S. Senator Charles S. Thomas, a Democrat, who was first elected by the state legislature to fill a vacancy in 1913, ran for re-election to a full term.
The 1920 United States Senate election in Colorado took place on November 2, 1920. Incumbent Democratic Senator Charles S. Thomas initially declined to run for re-election, and State Supreme Court Justice Tully Scott won the Democratic nomination to succeed him, facing off against former Leadville Mayor Samuel D. Nicholson, the Republican nominee. However, in October 1920, Thomas announced that he would run for re-election as the nominee of the National Party. However, Thomas's decision did not ultimately affect the outcome of the election. Aided by Republican presidential nominee Warren G. Harding's strong performance in the state, as well as Republican Governor Oliver Henry Shoup's landslide re-election, Nicholson defeated Tully and Thomas in a landslide. Out of four candidates, Thomas placed fourth, winning just 3% of the vote and finishing behind Farmer–Labor nominee G. F. Stevens.
The 1924 United States Senate special election in Colorado took place on November 4, 1924, to fill the remainder of the term for which Samuel D. Nicholson was elected in 1920. Nicholson died in office on March 24, 1923, and Democratic Governor William Ellery Sweet appointed Alva B. Adams, a prominent Pueblo attorney, to fill the vacancy. Adams, however, declined to be a candidate in the special election, instead challenging incumbent Republican Senator Lawrence C. Phipps in the regular election the same year.
The 1954 United States Senate election in Colorado took place on November 2, 1954. Incumbent Democratic Senator Edwin C. Johnson did not run for re-election, instead he gave up his seat to run for Governor again. Republican Lieutenant Governor Gordon Allott defeated Democratic U.S. Representative John A. Carroll in the race for the open seat.
The 2020 United States House of Representatives elections in Colorado was held on November 3, 2020, to elect the seven U.S. representatives from the state of Colorado, one from each of the state's seven congressional districts. The elections coincided with the 2020 U.S. presidential election, as well as other elections to the House of Representatives, elections to the United States Senate and various state and local elections.
The 1938 Colorado gubernatorial election was held on November 8, 1938. Republican nominee Ralph Lawrence Carr defeated Democratic incumbent Teller Ammons with 59.50% of the vote.
The 1932 United States Senate elections in Colorado took place on November 8, 1932. Incumbent Republican Senator Charles W. Waterman announced that he would not seek re-election to a second term. Attorney Karl C. Schuyler won the Republican nomination to succeed Waterman and faced former Senator Alva B. Adams, the Democratic nominee, in the general election.
