The 2002 United States Senate elections featured a series of fiercely contested elections that resulted in a victory for the Republican Party, which gained two seats and thus a narrow majority from the Democratic Party in the United States Senate. The Senate seats up for election, known as class 2 Senate seats, were last up for regular election in 1996. The election cycle was held on November 5, 2002, almost fourteen months after the September 11, 2001 attacks.
The 2000 United States Senate elections were held on November 7, 2000. The elections coincided with other federal and state elections, including the presidential election which was won by Republican George W. Bush. These elections took place six years after Republicans had won a net gain of eight seats in Senate Class 1. Despite George W. Bush's victory in the presidential election, the GOP lost 4 senate seats, the most a winning president's party has lost since the passage of the 17th amendment. This election marked the first election year since 1990 where Democrats made net gains in the Senate. Democrats defeated incumbent Republicans in Delaware, Michigan, Minnesota, Missouri, and Washington, and they won an open seat in Florida. In Missouri, the winner was elected posthumously. The Republicans defeated a Democratic incumbent in Virginia, and won an open seat in Nevada. Additionally, a Republican in Georgia died earlier in the year and a Democrat was appointed to replace him, who then went on to win the special election.
The 1998 United States Senate elections were held on November 3, with the 34 seats of Class 3 contested in regular elections. This was seen as an even contest between the Republican Party and Democratic Party. While the Democrats had to defend more seats up for election, Republican attacks on the morality of President Bill Clinton failed to connect with voters and anticipated Republican gains did not materialize. The Republicans picked up open seats in Ohio and Kentucky and narrowly defeated Democratic incumbent Carol Moseley Braun (Illinois), but these were cancelled out by the Democrats' gain of an open seat in Indiana and defeats of Republican Senators Al D'Amato and Lauch Faircloth. The balance of the Senate remained unchanged at 55–45 in favor of the Republicans.
The 1988 United States Senate elections were elections for the United States Senate. Held on November 8, 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 one seat in the Senate. Seven seats changed parties, with four incumbents being defeated. The Democratic majority in the Senate increased by one to 55–to–45.
The 1984 United States Senate elections were held on November 6, with the 33 seats of Class 2 contested in regular elections. They coincided with the landslide re-election of President Ronald Reagan in the presidential election. In spite of the lopsided presidential race, Reagan's Republican Party suffered a net loss of two Senate seats to the Democrats, although it retained control of the Senate with a reduced 53-47 majority. Democrats defeated incumbents in Illinois and Iowa, and won an open seat in Tennessee, while Republicans defeated an incumbent in Kentucky.
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.
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 1974 United States Senate elections were held on November 4, with the 34 seats of Class 3 contested in regular elections. They occurred in the wake of the Watergate scandal, Richard M. Nixon's resignation from the presidency, and Gerald Ford's subsequent pardon of Nixon. Economic issues, specifically inflation and stagnation, were also a factor that contributed to Republican losses. As an immediate result of the November 1974 elections, Democrats made a net gain of three seats from the Republicans, as they defeated Republican incumbents in Colorado and Kentucky and picked up open seats in Florida and Vermont, while Republicans won the open seat in Nevada. Following the elections, at the beginning of the 94th U.S. Congress, the Democratic caucus controlled 60 seats, and the Republican caucus controlled 38 seats.
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 1970 United States Senate elections was an election for the United States Senate. It took place on November 3, with the 33 seats of Class 1 contested in regular elections. Special elections were also held to fill vacancies. These races occurred in the middle of Richard Nixon's first term as president. The Democrats lost a net of three seats, while the Republicans and the Conservative Party of New York picked up one net seat each, and former Democrat Harry F. Byrd Jr. was re-elected as an independent.
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 would have hypothetically allowed the Senate Democrats to override a veto, propose constitutional amendments, or convict and expel certain officials without any votes from Senate Republicans. In practice, however, internal divisions effectively prevented the Democrats from doing so. The Senate election cycle coincided with Democratic gains in the House in the same year.
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 2006 United States Senate election in West Virginia was held November 7, 2006. Incumbent Democrat Robert Byrd won re-election to a ninth term. He was sworn in on January 3, 2007. However, he died in office on June 28, 2010, before the end of his term. This was Byrd's closest re-election.
The 2000 United States Senate election in Tennessee took place on November 7, 2000, as part of the general election including the 2000 U.S. presidential election, elections to the House of Representatives and various state and local elections. Incumbent Republican U.S. Senator Bill Frist won re-election to a second term, vastly improving on his performance from 1994.
The 2000 United States Senate election in Rhode Island was held on November 7, 2000. Republican U.S. Senator John Chafee had announced in 1999 that he would not seek reelection, leading his son, Lincoln Chafee, to announce his own candidacy. The elder Chafee, however, died a few months later; his son was appointed to fill the remainder of the unexpired term. The younger Chafee, now the incumbent, sought a full term and won, defeating Democratic U.S. Representative Bob Weygand. As of 2022, this was the last congressional election in Rhode Island to be won by a Republican.
The 1998 United States Senate election in Alabama was held November 3, 1998, alongside other elections to the United States Senate in other states as well as elections to the United States House of Representatives and various state and local elections. Incumbent Senator Richard Shelby won re-election to a third term. He was first elected in 1986 and re-elected in 1992 as a Democrat and switched parties in 1994 after the Republican Revolution, making this the first election he competed in as a Republican.
The 1992 United States Senate election in Arizona was held on November 3. Incumbent Republican U.S. Senator John McCain won re-election to a second term.
The 1976 United States Senate election in West Virginia was held on November 2, 1976. Incumbent Democratic U.S. Senator Robert Byrd won re-election to a fourth term. The Republican Party did not field a candidate for this election, leading to a 100% election victory for Robert Byrd. Byrd's 566,359 votes is the most received by a Democrat in any statewide election in the state's history.
The 1994 United States Senate election in Rhode Island was held November 8, 1994. Incumbent Republican U.S. Senator John Chafee won re-election to a fourth term. Chafee died of heart-failure on October 24, 1999, at Walter Reed Army Medical Center, having already announced his intention to retire in 2000 on March 15, 1999. His son Lincoln, then the mayor of Warwick, was appointed to replace him by Governor Lincoln Almond.
