The 1996 United States Senate elections were held on November 5, with the 33 seats of Class 2 contested in regular elections. Special elections were also held to fill vacancies. They coincided with the presidential election of the same year, in which Democrat Bill Clinton was re-elected president.
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 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 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 2008 United States Senate elections were held on November 4, 2008, with 35 of the 100 seats in the Senate being contested. Thirty-three seats were up for regular elections; the winners were eligible to serve six-year terms from January 3, 2009, to January 3, 2015, as members of Class 2. There were also two special elections, the winners of those seats would finish the terms that ended on January 3, 2013. The presidential election, which was won by Democrat Barack Obama, elections for all House of Representatives seats; elections for several gubernatorial elections; and many state and local elections occurred on the same date.
The 2006 United States Senate election in Utah was held November 7, 2006. Incumbent Republican Orrin Hatch won re-election to a sixth term. Hatch won all but one county with 60% to 70% of the vote. Ashdown won only Summit County by 342 votes.
The 2008 Delaware gubernatorial election took place on November 4, 2008, coinciding with the United States presidential election. Democratic state Treasurer Jack Markell defeated Republican William Swain Lee in a landslide, succeeding incumbent Ruth Ann Minner, also a Democrat, who was prevented from running for a third term.
The 2008 United States Senate election in Delaware was held on November 4, 2008. Incumbent Democratic U.S. Senator Joe Biden, who was also the Democratic nominee for vice president in the concurrent presidential election, faced Christine O'Donnell in the general election. Biden won re-election to a seventh term with 64.69% of the vote, his best-performing result in his senatorial career, while also being elected vice president. Biden took his oath of office in the Senate chamber with the rest of his colleagues on January 3, 2009, but resigned his seat on January 15, 2009, and assumed the vice presidency five days later. Delaware Governor Ruth Ann Minner appointed Ted Kaufman, a Democrat and longtime Biden advisor, to fill the vacant seat until a special election in 2010. O'Donnell once again ran unsuccessfully for the seat; she was defeated by Democrat Chris Coons.
The 2008 United States Senate election in Illinois was held on November 4, 2008. Incumbent Democratic U.S. Senator Dick Durbin sought a third term in office and faced minimal opposition from Republican Steve Sauerberg. As expected, Durbin overwhelmingly won re-election. On the same night, fellow Democratic Senator Barack Obama was elected President of the United States, defeating Republican Senator John McCain of Arizona.
The electoral history of Joe Biden, the 46th and current president of the United States, began in 1970. Biden served as the 47th vice president (2009–2017), and as a United States senator from Delaware (1973–2009). Biden is the oldest elected and serving president, the second Catholic president, after John F. Kennedy, and the first president from Delaware.
The 1972 United States Senate election in Delaware was held November 7, 1972. Incumbent Republican Senator J. Caleb Boggs ran for a third term in the United States Senate. Boggs faced off against Democrat Joe Biden, a New Castle County Councilman. Though Boggs was expected to easily win a third term, Biden narrowly defeated the incumbent on election day, even while fellow Democrat George McGovern lost Delaware by 20.4% in the concurrent presidential election. Biden's victory margin of 3,162 votes made this the closest U.S. Senate election of the year. Biden won a total of seven terms in the Senate, before being elected vice president in 2008 and in 2012 and president in 2020. At the age of 29, Biden became the youngest person to be elected senator since Rush Holt won in West Virginia in 1934 even as incumbent Republican President Richard Nixon overwhelmingly won the state for re-election on the same ballot.
The 1994 United States Senate election in Delaware was held November 8, 1994. Incumbent Republican U.S. Senator William V. Roth won re-election to a fifth term. William Roth is Delaware's first senator to win a fifth term. He was Delaware's longest-serving senator until Joe Biden won a sixth term in 2002. As of 2023, this was the last time the Republicans won a U.S. Senate election in Delaware.
The 1996 United States Senate election in Delaware was held on November 5, 1996. Incumbent Democratic U.S. Senator Joe Biden won re-election to a fifth term. This was the first Senate election in his career in which Biden's margin of victory decreased from the prior election.
Elections were held in Delaware on Tuesday, November 2, 2010. Primary elections were held on September 14, 2010.
The 1990 United States Senate election in Delaware was held on November 6, 1990. Incumbent Democratic U.S. Senator Joe Biden won re-election to a fourth term, defeating Republican challenger M. Jane Brady.
The 1984 United States Senate election in Delaware was held on November 6, 1984. Incumbent Democratic Senator Joe Biden won re-election to a third term, defeating Republican challenger John M. Burris.
The 1978 United States Senate election in Delaware was held on November 7, 1978. Incumbent Democratic United States Senator Joe Biden won re-election to a second term, defeating Republican challenger James H. Baxter Jr in a landslide victory. This is the first of five elections that Biden won all counties.
The 2014 United States Senate election in Delaware was held on November 4, 2014 to elect a member of the United States Senate to represent the State of Delaware, concurrently with other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.
The 2016 Delaware gubernatorial election took take place on November 8, 2016, to elect the Governor of Delaware, concurrently with the 2016 U.S. presidential election, as well as elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.
The 2020 United States Senate election in Delaware was held on November 3, 2020, to elect a member of the United States Senate to represent the State of Delaware, concurrently with the 2020 U.S. presidential election, as well as other elections to the United States Senate, elections to the United States House of Representatives, and various state and local elections.
