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.
Burton Kendall Wheeler was an attorney and an American politician of the Democratic Party in Montana, which he represented as a United States senator from 1923 until 1947.
Zales Nelson Ecton was an American attorney and politician from Montana who represented the state in the United States Senate, serving from 1947 to 1953.
Lee Warren Metcalf was an American lawyer, judge, and politician. A member of the Democratic Party, he served as a U.S. Representative (1953–1961) and a U.S. Senator (1961–1978) from Montana. He was the first of Montana's U.S. Senators to be born in the state, and was Permanent Acting President pro tempore of the Senate, the only one to hold that position, from 1963 until his death in 1978.
Roy Elmer Ayers was a U.S. Democratic politician. He served as a member of the United States House of Representatives and as the 11th Governor of Montana. He was the first governor of Montana to be born in what would become the state of Montana.
The 2008 United States Senate election in Montana was held on November 4, 2008. Incumbent Senator Max Baucus won re-election to a sixth term in a landslide, winning more than 70% of the vote and carrying every county in the state, despite Republican John McCain's narrow victory in the state in the concurrent presidential election. Baucus later resigned his seat on February 6, 2014 after the Senate confirmed him to be U.S. Ambassador to China, having already announced his intention to retire at the end of term on April 23, 2013. As of 2024, this is the last time Democrats won the Class 2 Senate seat in Montana.
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.
Leif Erickson was an American attorney who served as an Associate Justice of the Montana Supreme Court from 1939 to 1945.
The 1930 United States Senate election in Montana took place on November 4, 1930. Incumbent United States Senator Thomas J. Walsh, who was first elected to the Senate in 1912, and re-elected in 1918 and 1924, ran for re-election. He won the Democratic primary unopposed, and faced Montana Supreme Court Associate Justice Albert J. Galen, the Republican nominee, and several independent opponents in the general election. Ultimately, Walsh defeated his opponents in a landslide and won his fourth and final term in the Senate.
The 1930 United States Senate election in Montana took place on November 3, 1936. Incumbent United States Senator James E. Murray, who was first elected to the Senate in a special election in 1934, ran for re-election. He narrowly emerged from a competitive and close Democratic primary, wherein he was challenged by United States Congressman Joseph P. Monaghan, who represented Montana's 1st congressional district. In the general election, Murray was opposed by Thomas O. Larson, a State Senator and the Republican nominee, and Monaghan, who, after losing the primary, ran as an independent candidate. Murray ended up winning a second term, and his first full term, in a landslide, defeating both of his opponents by a comfortable margin.
The 1972 United States Senate election in Montana took place on November 7, 1972. Incumbent United States Senator Lee Metcalf, who was first elected to the Senate in 1960 and was re-elected in 1966, ran for re-election. After winning the Democratic primary, he moved on to the general election, where he faced Hank Hibbard, a State Senator and the Republican nominee. Following a close campaign, Metcalf managed to narrowly win re-election to his third term in the Senate over Hibbard. Montana was one of fifteen states alongside Alabama, Arkansas, Colorado, Delaware, Georgia, Iowa, Louisiana, Maine, Minnesota, Mississippi, New Hampshire, Rhode Island, South Dakota and West Virginia that were won by Republican President Richard Nixon in 1972 that elected a Democrat to the United States Senate.
The 1978 United States Senate election in Montana took place on November 7, 1978. Following the death of United States Senator Lee Metcalf on January 12, 1978, Montana Supreme Court Chief Justice Paul G. Hatfield was appointed to serve for the remainder of Metcalf's term. Hatfield opted to run for a full term, but was overwhelmingly defeated in the Democratic primary by U.S. Representative Max Baucus of the 1st congressional district. Baucus advanced to the general election, where he was opposed by the Republican nominee, author Larry R. Williams. Baucus ended up defeating Williams by a solid margin to win his first term in the Senate, and, following Hatfield's resignation on December 12, 1978, he began serving 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 1928 United States Senate election in Montana took place on November 6, 1928. Incumbent United States Senator Burton K. Wheeler, who was first elected to the Senate in 1922, ran for re-election. After successfully defeating several challengers in the Democratic primary, Wheeler advanced to the general election, where he faced Republican nominee Joseph M. Dixon, the former Governor of Montana who had previously served in the United States Senate from 1907 to 1913. Though the election was closer than Wheeler's first election, he still managed to defeat Dixon to win his second term in the Senate.
The 1934 United States Senate election in Montana took place on November 6, 1934. Incumbent United States Senator Burton K. Wheeler, who was first elected to the Senate in 1922, and was re-elected in 1928, ran for re-election. After easily winning the Democratic primary, Wheeler moved on to the general election, where he faced George M. Bourquin, a former United States Federal Judge and the Republican nominee. In a stark contrast to his close campaign in 1928, Wheeler won re-election to his third Senate term in a landslide.
The 1940 United States Senate election in Montana took place on November 5, 1940. Incumbent United States Senator Burton K. Wheeler, who was first elected to the Senate in 1922, and was re-elected in 1928 and 1934, ran for re-election. Though he faced a serious challenger in the Democratic primary, he emerged victorious, and advanced to the general election, where he faced E. K. Cheadle, a state district judge and the Republican nominee. Just like in 1934, Wheeler won re-election in a landslide, winning his fourth term in the Senate.
The 1952 United States Senate election in Montana took place on November 4, 1952. Incumbent United States Senator Zales Ecton, who was first elected to the Senate in 1946, ran for re-election. Ecton won the Republican primary uncontested, and advanced to the general election, where he faced Mike Mansfield, the United States Congressman from Montana's 1st congressional district and the Democratic nominee. Following a close campaign, Mansfield narrowly defeated Ecton, winning his first of several terms in the Senate.
The 1948 Montana gubernatorial election took place on November 2, 1948. Incumbent Governor of Montana Sam C. Ford, who was first elected Governor in 1940 and was re-elected in 1944, ran for re-election. He won the Republican primary and advanced to the general election, where he faced John W. Bonner, the former Attorney General of Montana and the Democratic nominee. Ultimately, Bonner defeated Ford handily in his bid for re-election, winning his first and only term as governor.
The 1944 Montana gubernatorial election took place on November 7, 1944. Incumbent Governor of Montana Sam C. Ford, who was first elected Governor in 1940, ran for re-election. He won the Republican primary and moved on to the general election, where he was opposed by Leif Erickson, a former Chief Justice of the Montana Supreme Court and the Democratic nominee. Although then-President Franklin D. Roosevelt comfortably won the state in that year's presidential election, Ford defeated Erickson by a wide margin to win his second and final term as governor. This election is the first time that an incumbent Republican Governor of Montana was re-elected or won re-election.
The 1946 United States Senate elections in Ohio was held on November 5, 1946, alongside a concurrent special election to the same seat.
