Since Colorado became a U.S. state in 1876, it has sent congressional delegations to the United States Senate and United States House of Representatives, beginning with the 44th United States Congress. Prior to statehood, the Colorado Territory sent non-voting delegates to the House of Representatives from 1861 to 1876. Each state elects two senators to serve for six years, and members of the House to two-year terms. Each state elects two senators to serve for six years in general elections, with their re-election staggered. Prior to the ratification of the Seventeenth Amendment in 1913, senators were elected by the Colorado General Assembly. Each state elects a varying number of, but at least one, member of the House, depending on population, to two-year terms. Colorado has sent eight members to the House in each congressional delegation since the 2020 United States Census.
From 1993 to 2023, Montana was represented in the United States House of Representatives by one at-large congressional district, among the 435 in the United States Congress. The district was the most populous U.S. congressional district, with just over 1 million constituents. It was also the second-largest by land area, after Alaska's at-large congressional district, and the largest by land area in the contiguous United States.
The 1988 United States Senate elections were elections for the United States Senate. Held on November 8, 1988, 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 1 seat in the Senate. 7 seats changed parties, with 4 incumbents being defeated. The Democratic majority in the Senate increased by one to 55–45.
The 1982 United States Senate elections were held on November 2, 1982. They were elections for the United States Senate following Republican gains in 1980. The 33 Senate seats of Class 1 were up for election in 1982. A total of four seats changed hands between parties, with Democrats winning seats in New Jersey and New Mexico, and Republicans taking seats in Nevada and the seat of the lone independent, Senator Harry Byrd Jr., in Virginia. Democrats made a net gain of one seat bringing them to 46 seats, while Republicans stayed at 54 seats for a majority. However, the Democratic gain in New Jersey replaced a Republican that had been appointed earlier in the year. Liberal Republicans senators in Connecticut, Rhode Island and Vermont held onto their seats, keeping the Senate in Republican hands.
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 1976 United States Senate elections was an election for the United States Senate. Held on November 2, the 33 seats of Class 1 were contested in regular elections. They coincided with Democrat Jimmy Carter's presidential election and the United States Bicentennial celebration. Although almost half of the seats decided in this election changed parties, Carter's narrow victory did not provide coattails for the Democratic Party. Each party flipped seven Senate seats, although, one of the seats flipped by Democrats was previously held by a Conservative.
The 1986 United States House of Representatives elections in South Carolina were held on November 4, 1986, 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. All four incumbents who ran were re-elected and the Democrats picked up one of the two open seats vacated by the Republicans. The composition of the state delegation after the elections was four Democrats and two Republicans.
The 1962 United States House of Representatives elections in South Carolina were held on November 6, 1962 to select six Representatives for two-year terms from the state of South Carolina. The primary elections were held on June 12 and the runoff elections were held two weeks later on June 26. All five incumbents who ran were re-elected and the open seat in the 2nd congressional district was retained by the Democrats. The composition of the state delegation thus remained solely Democratic.
The 1944 United States House of Representatives elections in South Carolina were held on November 7, 1944, to select six Representatives for two-year terms from the state of South Carolina. All five incumbents who ran were re-elected and the open seat in the 2nd congressional district was retained by the Democrats. The composition of the state delegation thus remained solely Democratic.
The 1948 United States House of Representatives elections in South Carolina were held on November 2, 1948 to select six Representatives for two-year terms from the state of South Carolina. Four incumbents were re-elected, but John J. Riley of the 2nd congressional district was defeated in the Democratic primary by Hugo S. Sims, Jr. The seat remained with the Democrats along with the open seat in the 3rd congressional district and the composition of the state delegation remained solely Democratic.
The 1936 United States House of Representatives elections in South Carolina were held on November 2, 1936, to select six Representatives for two-year terms from the state of South Carolina. All five incumbents who ran were re-elected and the open seat in the 4th congressional district was retained by the Democrats. The composition of the state delegation thus remained solely Democratic.
The 1988 United States Senate election in Montana took place on November 8, 1988. Incumbent United States Senator John Melcher, who was first elected to the Senate in 1976 and was re-elected in 1982, ran for re-election. After winning the Democratic primary, he faced Yellowstone County Commissioner Conrad Burns in the general election, and a grueling campaign followed. Ultimately, Melcher was narrowly defeated in his bid for re-election by Burns, who became the first Republican Senator from Montana in 36 years since Zales Ecton lost re-election in 1952.
The 2014 United States House of Representatives elections in Hawaii were held on Tuesday, November 4, 2014 to elect the two U.S. representatives from the state of Hawaii, one from each of the state's two congressional districts. The elections coincided with the elections of other federal and state offices, including an election for Governor of Hawaii and a special election to the United States Senate.
The 2014 congressional election in Montana was held on November 4, 2014, to elect the U.S. representative from Montana's at-large congressional district. Between 1993 and 2023, Montana had one at-large seat in the House.
The 1982 United States Senate election in Montana took place on November 2, 1982. Incumbent United States Senator John Melcher, who was first elected to the Senate in 1976, opted to run for re-election. He won the Democratic primary after he faced a tough intraparty challenger, and advanced to the general election, where he faced Larry R. Williams, an author and the Republican nominee, and Larry Dodge, the Libertarian nominee. Though his margin was reduced significantly from his initial election, Melcher still comfortably won re-election to his second and final term in the Senate.
The 1934 United States Senate special election in Montana took place on November 6, 1934. Incumbent United States Senator John E. Erickson, who, as governor, had appointed himself to the seat in 1933 upon the death of Thomas J. Walsh, ran for re-election. However, he was defeated in the Democratic primary by James E. Murray, who was the former Silver Bow County Attorney and the Chairman of the State Advisory Board of the Public Works Administration. In the general election, Murray defeated Scott Leavitt, a former United States Congressman who had represented Montana's 2nd congressional district, and an independent candidate in a landslide to win his first term in the Senate.
The 1954 United States Senate election in Montana took place on November 2, 1954. Incumbent United States Senator James E. Murray, who was first elected to the Senate in a special election in 1934 and was re-elected in 1936, 1942, and 1948, ran for re-election. After winning the Democratic primary against trivial opponents, he advanced to the general election, where he was opposed by Wesley A. D'Ewart, the Republican nominee and the United States Congressman from Montana's 2nd congressional district. A contentious and close election ensued, but ultimately, Murray was able to narrowly win re-election over D'Ewart to a final term in the Senate.
The 1960 United States Senate election in Montana took place on November 8, 1960. Incumbent United States Senator James E. Murray, who was first elected to the Senate in a special election in 1934 and was re-elected in 1936, 1942, and 1948, and 1954, declined to seek re-election, creating an open seat. United States Congressman Lee Metcalf won out in a crowded Democratic primary and faced off against former United States Congressman Orvin B. Fjare, who won in a similarly-crowded Republican primary. Following a close general election, Metcalf narrowly defeated Fjare to win his first term in the Senate.
The 1922 United States Senate election in Montana took place on November 7, 1922. Incumbent United States Senator Henry L. Myers, who was first elected to the Senate in 1910, and was re-elected in 1916, declined to seek re-election. Former United States Attorney Burton K. Wheeler won the Democratic primary and advanced to the general election, where he faced Carl W. Riddick, the United States Congressman from Montana's 2nd congressional district and the Republican nominee. Ultimately, Wheeler defeated Riddick comfortably and won his first term in the Senate.
The 2022 United States House of Representatives elections in Montana were held on November 8, 2022, to elect two U.S. Representatives from Montana, one from each of its congressional districts. Prior to this election cycle, Montana had one at-large district, represented by Republican Matt Rosendale. However, during the 2020 redistricting cycle, Montana regained the 2nd district that it lost in 1993.
