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 allowed the Senate Democrats to override a veto, propose constitutional amendments, or convict and expel certain officials without any votes from Senate Republicans. However, internal divisions would have prevented the Democrats from having done so. The Senate election cycle coincided with Democratic gains in the House in the same year.
The 1944 United States Senate elections coincided with the re-election of Franklin D. Roosevelt to his fourth term as president. The 32 seats of Class 3 were contested in regular elections, and three special elections were held to fill vacancies.
The 1938 United States Senate elections occurred in the middle of Franklin D. Roosevelt's second term. The 32 seats of Class 3 were contested in regular elections, and special elections were held to fill vacancies. The Republicans gained eight seats from the Democrats, though this occurred after multiple Democratic gains since the 1932 election, leading to the Democrats retaining a commanding lead over the Republicans with more than two-thirds of the legislative chamber.
The 1958 New York state election was held on November 4, 1958, to elect the governor, the lieutenant governor, the state comptroller, the attorney general, a judge of the New York Court of Appeals and a U.S. Senator, as well as all members of the New York State Assembly and the New York State Senate.
The 1946 New York state election was held on November 5, 1946, to elect the governor, the lieutenant governor, the state comptroller, the attorney general, a U.S. Senator, the chief judge and an associate judge of the New York Court of Appeals, as well as all members of the New York State Assembly and the New York State Senate.
The 1938 New York state election was held on November 8, 1938, to elect the governor, the lieutenant governor, the state comptroller, the attorney general, two U.S. Senators and two U.S. Representatives-at-large, as well as all members of the New York State Assembly and the New York State Senate. The 1938 election was the first election where the Governor of New York was elected to a four-year term, rather than a two-year term.
The 1930 New York state election was held on November 4, 1930, to elect the governor, the lieutenant governor, the state comptroller, the attorney general and a judge of the New York Court of Appeals, as well as all members of the New York State Assembly and the New York State Senate.
The 1928 New York state elections were held on November 6, 1928, to elect the governor, the lieutenant governor, the state comptroller, the attorney general, a U.S. Senator and a judge of the New York Court of Appeals, as well as all members of the New York State Assembly and the New York State Senate.
The 1932 New York state election was held on November 8, 1932, to elect the governor, the lieutenant governor, the state comptroller, the attorney general, the chief judge, a U.S. Senator and two U.S. Representatives-at-large, as well as all members of the New York State Assembly and the New York State Senate.
The 1944 New York state election was held on November 7, 1944, to elect a judge of the New York Court of Appeals and a U.S. senator, as well as all members of the New York State Assembly and the New York State Senate.
The 1964 United States Senate election in New York was held on November 3, 1964. Incumbent Republican U.S. Senator Kenneth Keating ran for re-election to a second term, but was defeated by Robert F. Kennedy.
The 1968 United States Senate election in New York was held on November 5, 1968. Incumbent Republican U.S. Senator Jacob Javits defeated Democratic challenger Paul O'Dwyer and Conservative Party challenger James Buckley in a three-way race.
The United States Senate election of 1926 in New York was held on November 2, 1926. Incumbent Republican Senator James Wolcott Wadsworth Jr. ran for re-election to a third term, but was defeated by Democrat Robert F. Wagner.
The United States Senate election of 1938 in New York was held on November 8, 1938. Incumbent Democratic Senator Robert F. Wagner was re-elected to a third term over Republican John Lord O'Brian.
The United States Senate special election of 1949 in New York was held on November 8, 1949. On June 28, 1949, incumbent senator Robert F. Wagner resigned due to ill health. On July 7, John Foster Dulles was appointed by Governor Thomas Dewey to fill the vacancy temporarily.
The United States Senate election of 1920 in New York was held on November 2, 1920. Incumbent Republican Senator James Wolcott Wadsworth Jr. was re-elected to a second term over Democratic Lieutenant Governor Harry C. Walker.
The United States Senate election of 1944 in New York was held on November 8, 1944. Incumbent Democratic Senator Robert F. Wagner was re-elected to a fourth term over Republican Thomas J. Curran. Wagner would not complete the term, resigning in June 1949 due to ill health.
A Massachusetts general election was held on November 6, 1956, in the Commonwealth of Massachusetts.
A Massachusetts general election was held on November 2, 1954 in the Commonwealth of Massachusetts.
The 1916 United States Senate election in New York was held on November 7, 1916. Incumbent Democratic Senator James O'Gorman chose not to seek re-election. Republican William M. Calder was elected to a succeed O'Gorman, defeating Democrat William F. McCombs.
