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 1968 United States Senate elections were elections for the United States Senate. Held on November 5, the 34 seats of Class 3 were contested in regular elections. They coincided with the presidential election of the same year. Although Richard Nixon won the presidential election narrowly, the Republicans picked up five net seats in the Senate. This saw Republicans win a Senate seat in Florida for the first time since Reconstruction.
The 1960 United States Senate elections coincided with the election of John F. Kennedy as president on November 8, 1960. The 33 seats of Class 2 were contested in regular elections. A special election was also held on June 28, 1960, for a mid-term vacancy in North Dakota. The Republicans gained two seats at the expense of the Democrats. However, Republican Senator-elect Edwin Keith Thomson of Wyoming died December 9, 1960, and was replaced by appointee Democratic John J. Hickey at the beginning of the Congress, reducing Republican gains to one seat.
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 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 1978 United States Senate election in Maine was held on November 7, 1978. Incumbent Democratic U.S. Senator William Hathaway ran for re-election to a second term, but was defeated by William Cohen, the Republican U.S. Representative from Maine's 2nd congressional district.
The 1948 United States Senate election in Maine was held on September 13, 1948. Incumbent Republican U.S. Senator and Senate Majority Leader Wallace White did not seek a fourth term in office.
The 1972 United States Senate election in Maine was held on November 7, 1972. Incumbent Republican U.S. Senator Margaret Chase Smith ran for re-election to a fifth term, but was defeated by Democrat William Hathaway. As of 2023, this was the last time the Democrats won the Class 2 Senate seat from Maine.
The 1930 United States Senate election in Maine was held on September 8, 1930. Incumbent Republican U.S. Senator Arthur Gould, who had been elected to complete the term of the late Senator Bert Fernald, did not run for re-election to a full term.
The 1936 United States Senate election in Maine was held on September 14, 1936. Incumbent Republican U.S. Senator Wallace White was re-elected to a second term over Governor Louis J. Brann.
The 1940 United States Senate election in Maine was held on September 9, 1940.
The 1946 United States Senate election in Maine was held on September 9, 1946.
The 1942 United States Senate election in Maine was held on September 14, 1942. Incumbent Republican U.S. Senator Wallace White was re-elected to a third term over Fulton J. Redman.
The 1954 United States Senate election in Maine was held on September 13, 1954. Incumbent Republican U.S. Senator Margaret Chase Smith was re-elected to a second term over Democrat Paul Fullam.
The 1964 United States Senate election in Maine was held on November 3, 1964. Incumbent Democrat Edmund Muskie was re-elected to a second term in office over Republican U.S. Representative Clifford McIntire. This was the first senate race for this particular seat in which the election was held in November and not September.
The 1966 United States Senate election in Maine was held on November 8, 1966. Incumbent Republican U.S. Senator Margaret Chase Smith was re-elected to a fourth term over Democratic State Senator Elmer H. Violette.
Lucia M. Cormier was an American politician from Maine. Cormier, a Democrat from Rumford, served in the Maine House of Representatives from 1947 to 1950 and 1953 to 1960. In 1950, Cormier defeated Adrian Scolten to win the Democratic nomination for Maine's 1st congressional district. She lost in the general election to incumbent Robert Hale with 46% of the vote, which was considered a strong showing in Republican-controlled Maine. She later became a Maine delegate to the Democratic National Committee.
The 1916 United States Senate election in Maine was held on September 11, 1916.
The 1922 United States Senate election in Maine was held on September 11, 1922, to elect a United States senator from Maine. Incumbent Senator Frederick Hale was re-elected to a second term.
The 1924 United States Senate election in Maine was held on September 8, 1924. Incumbent Republican U.S. Senator Bert Fernald overcame a challenge from U.S. Representative Frank E. Guernsey in the Republican primary. In the general election, Fernald was re-elected to a second term in office over Democratic newspaperman Fulton J. Redman.
