Biden: 50–60% 60–70% 70–80% 80–90% >90%
O'Donnell: 50–60% 60–70%
|Elections in Delaware|
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.
This marked the last time Biden won all three counties in the state, as concurrently in his vice presidential runs in 2008 and 2012, and in his presidential run in 2020, he would go on to only win New Castle and Kent counties, as Sussex County would vote for the Republican ticket in each election.
- Christine O'Donnell, media consultant and political analyst
- Tim Smith, businessman
O'Donnell faced businessman Tim Smith at the Republican state party convention and won with more than 60 percent of the delegate vote.
On August 23, 2008, Democratic Party presidential nominee Barack Obama announced that he had selected Biden to serve as his vice presidential running mate. Under Delaware law, Biden could run simultaneously for both his Senate seat and for vice president, which he decided to do.
O'Donnell tried to make an issue of Biden's dual campaigns, claiming that serving his constituents was not important to him, and criticized his unwillingness to participate in debates and candidate forums. Nevertheless, she was heavily outspent by Biden and her campaign failed to gain traction. Her campaign ended with $23,000 in debt.
|The Cook Political Report||Safe D||October 23, 2008|
|CQ Politics||Safe D||October 31, 2008|
|Rothenberg Political Report||Safe D||November 2, 2008|
|Real Clear Politics||Safe D||November 4, 2008|
|Survey USA||September 22–23, 2008||64%||32%|
|West Chester University/WHYY||October 6–8, 2008||65%||29%|
|Survey USA||October 27–28, 2008||66%||32%|
|Democratic||Joe Biden (incumbent)||257,539||64.69%||+6.47%|
|County||Joseph Robinette Biden, Jr.
|Christine Therese O'Donnell
|Total votes cast|
Counties that flipped from Republican to Democratic
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- Campaign contributions for Delaware congressional races from OpenSecrets