United States elections, 1966

Partisan control of Congress and the presidency

	Previous party	Incoming party
President	Democratic	Democratic
House	Democratic	Democratic
Senate	Democratic	Democratic

The 1966 United States midterm elections were held on November 8, 1966, and elected the members of the 90th United States Congress. The election was held in the middle of Democratic President Lyndon B. Johnson's second term in office, during the Vietnam War. Johnson's Democrats lost forty-seven seats to the Republican Party in the House of Representatives. The Democrats also lost three seats in the U.S. Senate to the Republicans. Despite their losses, the Democrats retained control of both chambers of Congress. Republicans won a large victory in the gubernatorial elections, with a net gain of seven seats. This was the first election held after the passage of the Voting Rights Act of 1965, which led to a surge in African-American voter participation.

The Republican Party had risked sliding into irrelevance after the disastrous 1964 elections, and the GOP's victory in this election invigorated new life into the party and strengthened the conservative coalition. The GOP made inroads into the South and among blue collar workers, foreshadowing Nixon's Southern strategy and the rise of Reagan Democrats, respectively. Among the newly elected Republicans were future presidents Ronald Reagan (who soon became the leader of the right-wing of the Republican Party) and George H.W. Bush, and future vice president Spiro Agnew. The election also helped establish former vice president Richard Nixon (who campaigned heavily for Republicans) as a front-runner for the 1968 Republican nomination. President Johnson was mostly unable to pass major expansions to the Great Society in the 90th Congress.

See also

• United States House of Representatives elections, 1966
• United States Senate elections, 1966
• United States gubernatorial elections, 1966