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 2008 United States Senate election in Colorado was held November 4, 2008. The primary elections were held August 12, 2008. Incumbent Republican U.S. Senator Wayne Allard decided to retire instead of seeking a third term. Democratic nominee Mark Udall won the open seat, making this the first time a Democrat won this seat since 1972, and that Democrats held both Senate seats since 1979.
The 2008 United States Senate election in Louisiana was held on November 4, 2008. This was the first time since the 1970s that Louisiana used primaries for federal races. Incumbent Senator Mary Landrieu won a third term by 6.39 percentage points despite being forecast as one of the most vulnerable Senate Democrats during 2008. She had received praise and wide publicity for her advocacy after Hurricane Katrina, particularly during hearings regarding FEMA's response to the disaster. This is the last time that Democrats won any statewide election in Louisiana other than Governor.
The 2008 United States Senate election in Arkansas was held on November 4, 2008. Incumbent Senator Mark Pryor ran for a second term. No Republican filed to challenge him, and his only opponent was Green Party candidate Rebekah Kennedy. Pryor won re-election with almost 80% of the vote.
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 Kansas was held on November 4, 2008. Incumbent Republican U.S. Senator Pat Roberts won re-election to a third term.
The 2008 United States Senate election in Georgia took place on November 4, 2008. The run off election took place on December 2, 2008. Republican Senator Saxby Chambliss, first elected in 2002, sought re-election to his position as a United States Senator from Georgia. He was challenged by Democratic nominee Jim Martin and Libertarian nominee Allen Buckley. After a runoff election on December 2, Chambliss was elected.
The 2008 United States Senate election in Idaho was held on November 4, 2008. The primary elections were held on May 27. Incumbent Senator Larry Craig decided to retire instead of seeking a fourth term. Fellow Republican Jim Risch won the open seat.
The United States Senate election in Illinois was held on November 5, 2002. Incumbent Democratic U.S. Senator Dick Durbin sought re-election to a second term in the United States Senate. Durbin defeated Republican challenger State Representative Jim Durkin in a landslide.
The 2008 United States Senate election in Mississippi was held on November 4, 2008. The seat was regularly scheduled for election, unlike the special election taking place on the same day. Incumbent Republican U.S. Senator Thad Cochran won re-election to a sixth term.
The 2002 Illinois gubernatorial election occurred on November 5, 2002. Incumbent Republican governor George Ryan, who was plagued by scandal, did not run for a second term. Democrat Rod Blagojevich, a U.S. Congressman, ran against Republican Jim Ryan, the Illinois Attorney General. Blagojevich won 52% to 45%, becoming the first Democrat to win an election for governor since 1972.
The 2010 United States Senate election in Colorado 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. In December 2008, President-elect Barack Obama nominated incumbent U.S. Senator Ken Salazar as Secretary of the Interior. After Salazar resigned from his seat, Democratic governor Bill Ritter appointed Denver Public Schools Superintendent Michael Bennet to fill the seat.
The 2010 United States Senate elections in Illinois took place on November 2, 2010. There were two ballot items for the same seat: a general election, to fill the Class 3 seat beginning with the 112th United States Congress beginning on January 3, 2011, and a special election, to fill that seat for the final weeks of the 111th Congress. Roland Burris, who was appointed to fill the vacancy created by fellow Democrat Barack Obama's election to the presidency, did not run in either election.
The 2010 Illinois gubernatorial election took place on November 2, 2010. Incumbent Democratic Governor Pat Quinn was elected to a full term in office, having become governor in 2009 following the impeachment and removal of Governor Rod Blagojevich. Quinn was elected as the Democratic nominee, the Illinois Green Party nominee was attorney and 2006 nominee Rich Whitney, the Republican nominee was State Senator Bill Brady, the Libertarian Party nominee was Lex Green, and Scott Lee Cohen ran as an independent.
The 2008 United States presidential election in Illinois took place on November 4, 2008, and was part of the 2008 United States presidential election. Voters chose 21 representatives, or electors to the Electoral College, who voted for president and vice president.
The 1984 United States Senate election in Illinois took place on November 6, 1984. Incumbent Republican Senator Charles H. Percy ran for re-election to a fourth term in the United States Senate. Senator Percy was opposed by Democratic nominee Paul Simon, who was a United States Congressman from Illinois's 22nd congressional district. The campaign between Percy and Simon was contentious and brutally fought, and ended up with Simon ousting Percy by fewer than 90,000 votes, which was, at the time, considered an upset. Incidentally, Percy's son-in-law Jay Rockefeller was elected Senator from West Virginia in the same election cycle.
The 2014 Illinois gubernatorial election was held on November 4, 2014, to elect the Governor and Lieutenant Governor of Illinois, concurrently with the election to Illinois's Class II U.S. Senate seat, 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 2014 United States Senate election in Illinois took place on November 4, 2014, to elect a member of the United States Senate to represent the State of Illinois, concurrently with the election of the Governor of Illinois, 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 Illinois was held on November 8, 2016, to elect a member of the United States Senate to represent the State of Illinois, 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 2020 United States Senate election in Illinois was held on November 3, 2020, to elect a member of the United States Senate to represent the State of Illinois, 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 and the Illinois Fair Tax. Incumbent Democratic Senator Dick Durbin, who had been Senate Minority Whip since 2015, won reelection to a fifth term in office, defeating Republican nominee Mark Curran.
