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 2006 United States Senate election in Montana was held November 7, 2006. The filing deadline was March 23; the primary was held June 6. Incumbent Republican Senator Conrad Burns ran for re-election to a fourth term, but lost to Democrat Jon Tester by a margin of 0.87%, or 3,562 votes out of 406,505 cast. This made the election the second-closest race of the 2006 Senate election cycle, behind only the election in Virginia.
The 2008 United States Senate election in Oklahoma was held on November 4, 2008. The statewide primary election was held July 29, with the run-off on August 26. Incumbent Republican U.S. Senator Jim Inhofe won re-election to a third term over Democrat Andrew Rice.
The 2008 United States Senate election in Oregon was held on November 4, 2008. Incumbent Republican U.S. Senator Gordon H. Smith sought reelection to a third term. Smith was the only Republican Senator from the West Coast and the only Republican holding statewide office in Oregon. He was opposed by Democrat Jeff Merkley, the Speaker of the Oregon House of Representatives, and David Brownlow of the Constitution Party of Oregon. Merkley won by a narrow margin, with Smith not conceding until two days after the election. Merkley became the first Democrat to win this seat since 1960. And since Smith was the only Republican holding statewide office in Oregon at the time, this was the first time since 1860 that no Republicans won or held statewide office in Oregon. Jeff Merkley's inauguration marked the first time since 1967 that Democrats held both of Oregon's United States Senate seats.
The 2008 United States Senate election in Texas was held on November 4, 2008. Incumbent Republican John Cornyn defeated Democratic nominee Rick Noriega, a member of the Texas House of Representatives, to win re-election to a second term in office.
The 2008 United States Senate election in Michigan was held on November 4, 2008 Incumbent Democratic U.S. Senator Carl Levin won reelection to a sixth and final term.
The 2002 Oregon gubernatorial election took place on November 5, 2002. Incumbent Democrat John Kitzhaber was barred by term limits from seeking a third consecutive term; he later successfully ran again in 2010 and 2014. To replace him, former Oregon Supreme Court Associate Justice Ted Kulongoski won a crowded and competitive Democratic primary, while former State Representative Kevin Mannix emerged from an equally competitive Republican primary. The campaign between Kulongoski and Mannix, who were joined by Libertarian nominee Tom Cox, was close and went down to the wire. Ultimately, Kulongoski eked out a narrow margin of victory over Mannix, which was slightly smaller than Cox's total vote share, allowing Kulongoski to win what would be the first of two terms as governor. As of 2023, this is the last time that Oregon voted for a gubernatorial nominee and a U.S. Senate nominee of different political parties.
The 2004 United States Senate election in Oregon was held on November 2, 2004. Incumbent Democratic U.S. Senator Ron Wyden won re-election to a second full term. As of 2024, this is the most recent United States Senate election in Oregon in which any Eastern Oregon counties voted for the Democratic nominee, and it is Oregon’s most recent senatorial election in which the winning candidate carried the majority of the state’s counties.
The 2010 United States Senate election in Arkansas took place on November 2, 2010 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.
The 2010 United States Senate election in Indiana took place on November 2, 2010, alongside 33 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 to fill Indiana's class III United States Senate seat. Incumbent Democratic Senator Evan Bayh decided in February 2010 to retire instead of seeking a third term shortly after Dan Coats announced his candidacy. Bayh's announcement came one day before the filing deadline and no Democratic candidate submitted enough signatures by the deadline to run, so the State Democratic Party chose U.S. Congressman Brad Ellsworth as their nominee. The Libertarian Party nominated YMCA instructor Rebecca Sink-Burris, who had previously unsuccessfully run for this seat in 1998. Coats won the open seat; having previously held it from 1989 to 1999. Bayh later unsuccessfully ran for this seat again in 2016.
The 2010 United States Senate election in Washington was held on November 2, 2010 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 Democratic U.S. Senator Patty Murray won re-election to a fourth term by a margin of 52.1% – 47.4% over Republican Dino Rossi, who had twice run for governor in 2004 and 2008. As of 2023, this was the last U.S. Senate election in Washington in which the margin of victory was within single digits.
The 2010 United States Senate election in Oklahoma was held on November 2, 2010. Incumbent Republican Senator Tom Coburn won re-election to a second term.
The 2010 United States Senate election in Georgia took place on November 2, 2010. Incumbent Republican U.S. Senator Johnny Isakson won re-election to a second term.
The 2010 United States Senate election in Maryland was held on November 2, 2010. Primary elections were held on September 14, 2010. Incumbent Democratic U.S. Senator Barbara Mikulski won re-election to a fifth term.
The 2010 United States Senate election in Wisconsin was held on November 2, 2010. Incumbent Democratic Senator Russ Feingold lost re-election to a fourth term to Republican challenger Ron Johnson, a businessman and first-time candidate. Johnson was the first Republican to win a Senate election in Wisconsin since 1986. Feingold also became the fifth senator in a row from Wisconsin's Class 3 Senate seat to be defeated for re-election in the general election, and the seventh in a row overall to lose by a defeat in either the primary or general elections. Johnson was re-elected in 2016 in a rematch with Feingold.
James L. Huffman is a former professor of law and the former dean of Lewis & Clark Law School in Portland, Oregon. He was the Republican nominee in the 2010 U.S. Senate election in Oregon, losing to incumbent Democrat Ron Wyden.
The 1990 Oregon United States Senate election was held on November 6, 1990, to select the U.S. Senator from the state of Oregon. Republican candidate Mark Hatfield was re-elected to a fifth term, defeating Democratic businessman Harry Lonsdale.
The 2014 United States Senate election in Oregon took place on November 4, 2014 to elect a member of the United States Senate to represent the State of Oregon, concurrently with the election of the Governor of Oregon, as well as 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 United States Senate election in Oregon was held November 8, 2016, to elect a member of the United States Senate to represent the State of Oregon, concurrently with the 2016 U.S. presidential election, as well as 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 2022 United States Senate election in Oregon was held on November 8, 2022, to elect a member of the United States Senate to represent the state of Oregon.
