2008 United States Senate election in Delaware
November 4, 2008
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Biden: 50–60% 60–70% 70–80% 80–90% >90% O'Donnell: 50–60% | |||||||||||||||||
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Personal U.S. Senator from Delaware 47th Vice President of the United States Vice presidential campaigns 46th President of the United States Tenure ![]() |
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The 2008 United States Senate election in Delaware was held on November 4, 2008. Incumbent Senator Joe Biden, who was also the Democratic nominee for vice president in the concurrent presidential election, faced Republican challenger 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. It was O'Donnel's second run for the Senate after a failed write-in campaign in 2006. Biden primarily focused on his vice presidential run, which O'Donnell criticized him for. Despite this, he still outspent her. During the 2010, it was discovered O'Donnell broke campaign finance regulation by spending donations on personal expenses.
Shortly after being sworn in, Biden resigned from the Senate to assume the vice presidency, and long-time Biden advisor Ted Kaufman was appointed to fill the vacancy. A special election was held in 2010 where O'Donnell once again ran unsuccessfully.
Background
In January 2008, following a poor performance in the Iowa Caucus, Biden ended his 2008 presidential bid to instead focus on running for a seventh term in the United States Senate. He was unopposed within his party.[1] On August 23, the Democratic Party's presidential nominee, Illinois Senator Barack Obama, announced that he had selected Biden to serve as his running mate in the 2008 United States presidential election.[2] Under Delaware law, Biden could run simultaneously for both his Senate seat and vice president, which he decided to do.[3]
O'Donnell had previously run in for Delaware's Class One senate seat in 2006. After losing the Republican Primary to Jan C. Ting, she ran in the general election as a write-in candidate. She lost, only receiving less than five percent of the vote.[4] The statewide party primary elections were held September 9, 2008, both candidates ran unopposed.[5]
Candidates
The primary election was held on September 9, 2008. Both candidates ran unopposed.[6][1]
- Christine O'Donnell (Republican), media consultant, political analyst and write-in candidate in 2006[6]
Predictions
Pundits believed Biden would easily win reelection, with all major polls placing him over 30 points ahead of O'Donnell. The first poll, conducted in mid-September by Fairleigh Dickinson University, gave Biden the best projection with a +43 margin. His weakest projection came from SurveyUSA with a +32 margin. The final poll of the election was conducted in late October by SurveryUSA, it projected Biden to win by 34 percent.[7]
| Source | Ranking | Date of Prediction | Ref |
|---|---|---|---|
| The Cook Political Report | Safe D | October 23, 2008 | [8] |
| Congressional Quarterly | Safe D | October 31, 2008 | [9] |
| Rothenberg Political Report | Safe D | November 2, 2008 | [10] |
General election
Biden largely ignored the election in favor of Obama's presidential run.[3] O'Donnell tried to make an issue of the dual campaigns, claiming that doing so was evidence that serving his constituents was not important to him as well as criticizing his unwillingness to participate in debates and candidate forums. Politico's Daniel Libit writing about O'Donnell said, "nowhere else in America is a challenger wanting her incumbent opponent to campaign harder against her."[11]
Biden put up very few campaign advertisements,[11] nevertheless he heavily outspent O'Donnell and her campaign failed to gain traction. Her campaign ended with thousands in debt.[12][13] Kristin Murray briefly served as the campaign manager for O'Donnell. Murray claimed she left the campaign willingly because of O'Donnell's financial situation, though O'Donnell claimed she was fired.[12] During O'Donnell's 2010 campaign for the seat, Murray claimed that O'Donnell was misusing her campaign donations and using the money to pay her rent and other "personal expenses".[14]
O'Donnel received the endorsements of astronaut Buzz Aldrin, Missouri Governor Haley Barbour, and activist David Horowitz.[11]
Results
The election was held on November 4, 2008. Only minutes after the polls closed the race was called for Biden.[15] He was re-elected in a landslide victory against O'Donnell,[16][17] securing his largest margin of victory while improving on his 2002 performance by around 6.5%.[18]
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Democratic | Joe Biden (incumbent) | 257,539 | 64.69% | +6.47% | |
| Republican | Christine O'Donnell | 140,595 | 35.31% | −5.49% | |
| Majority | 116,944 | 29.38% | |||
| Total votes | 398,134 | ||||
| Democratic hold | |||||
Biden won all three counties, flipping Kent County from Republican to Democrat.[19][18] This marked the last time he won all three counties in a general election. In his vice presidential runs in 2008 and 2012, and in his presidential run in 2020, Sussex County would vote for the Republican candidates.[20][21][22]
Biden's best performance was in New Castle County, where he won around 72 percent of the vote to O'Donnell's 28 percent. O'Donnell's best performance was in Sussex County, where she almost won the county, receiving 49.84% of the vote to Biden's 50.16%, his weakest performance. New Castle County had the highest number of votes cast with 246 thousand, followed by Sussex County with 86 thousand.[19]
| County | Joseph Robinette Biden Jr. Democratic |
Christine Therese O'Donnell Republican |
Total votes cast | Ref(s) | ||
|---|---|---|---|---|---|---|
| # | % | # | % | |||
| Kent | 37,074 | 56.99% | 27,981 | 43.01% | 65,055 | [19] |
| New Castle | 177,070 | 71.82% | 69,491 | 28.18% | 246,561 | |
| Sussex | 43,395 | 50.16% | 43,123 | 49.84% | 86,790 | |
| Total | 257,539 | 64.69% | 140,595 | 35.31% | 398,406 | |
Aftermath
Biden took the oath of office in the Senate chamber with his fellow senators-elect on January 3, 2009,[23] but resigned his seat on January 15, 2009, and assumed the vice presidency five days later.[24] Outgoing Delaware Governor Ruth Ann Minner appointed Ted Kaufman, a Democrat and longtime Biden advisor, to fill the vacant seat pending a 2010 special election. Kaufman stated he had no plans to run in 2010.[25] O'Donnell once again ran unsuccessfully for the seat, losing to Democrat Chris Coons.[26] In 2015, she was sued by the Federal Election Commission for misuse of campaign funds.[27] She was found guilty in 2016.[28]
See also
References
- ^ a b Giroux, Greg (September 10, 2008). "Franken Primary Win One of Many Key Results From Tuesday's Primaries". Congressional Quarterly. Archived from the original on September 12, 2008. Retrieved September 26, 2008.
- ^ Silverstein, Stuart; Neuman, Johanna (August 23, 2008). "Biden's the pick, sources confirm". Los Angeles Times. Retrieved August 23, 2008.
- ^ a b Libit, Daniel (October 4, 2008). "Joe Biden's other female foe". Politico. Retrieved February 19, 2025.
- ^ Leip, David. "2006 Senatorial General Election Results - Delaware". Dave Leip's Atlas of U.S. Presidential Elections. Archived from the original on April 16, 2024. Retrieved February 26, 2025.
- ^ a b Canavan, Eileen J.; Bucelato, Jason (July 2009). "Federal Elections 2008 Election Results for the U.S. President, the U.S. Senate and the U.S. House of Representatives" (PDF). Federal Election Commission. p. 72. Retrieved March 12, 2025.
- ^ a b "Christine O'Donnell: Delaware's dark horse". CNN. Retrieved February 6, 2026.
- ^ "2008 Delaware Senate". Real Clear Politics. Retrieved November 14, 2025.
- ^ "2008 Senate Race ratings for October 23, 2008". The Cook Political Report. Retrieved April 1, 2021.
- ^ "Race Ratings Chart: Senate". Congressional Quarterly. Archived from the original on October 28, 2010. Retrieved February 27, 2025.
- ^ Gonzales, Nathan L. (November 2, 2008). "2008 Senate ratings". Inside Elections. Rothenberg Political Report. Retrieved April 1, 2021.
- ^ a b c Libit, Daniel (October 4, 2008). "Joe Biden's other female foe". Politico. Retrieved November 1, 2008.
- ^ a b Catanese, David (September 14, 2010). "Ex-aide: O'Donnell a 'complete fraud'". Politico. Retrieved February 27, 2025.
- ^ Gibson, Ginger (March 20, 2010). "Delaware politics: O'Donnell faces campaign debt, back-tax issues". The News Journal. Retrieved September 16, 2010.
- ^ "Checkered Financial Past Dogs Tea Party's Christine O'Donnell in Senate Bid". ABC News. Retrieved February 27, 2025.
- ^ Burkeman, Oliver (November 4, 2008). "Liveblogging the 2008 US presidential election, part one". The Guardian. ISSN 0261-3077. Retrieved February 19, 2025.
- ^ Catanese, David (September 17, 2010). "Ex-aides unload on O'Donnell". Politico. Retrieved February 19, 2025.
- ^ a b Miller, Lorraine C. (July 10, 2009). "Statistics of the Presidential and Congressional Elections of November 4, 2008". Clerk of the United States House of Representatives.
- ^ a b c Leip, David. "2002 Senatorial General Election Results - Delaware". Dave Leip's Atlas of U.S. Presidential Elections. Retrieved February 19, 2025.
- ^ a b c Election Results (Map). The New York Times. December 9, 2008. Retrieved February 18, 2025.
- ^ "President Map - Election Results 2008" (Map). The New York Times. Retrieved February 19, 2025.
- ^ "President - Live Election Results". The New York Times. ISSN 0362-4331. Retrieved February 19, 2025.
- ^ "Delaware 2020 presidential election results". CNN. Retrieved February 19, 2025.
- ^ Levi, Michelle (January 6, 2009). "Biden Sworn In (As a Senator)". CBS News. Retrieved December 3, 2020.
- ^ Rudin, Ken (January 12, 2009). "Why Is VP-Elect Joe Biden Still A Senator?". NPR. Retrieved February 19, 2025.
- ^ Mahtesian, Charles (January 25, 2010). "Beau Biden declines Senate bid". Politico. Retrieved February 19, 2025.
- ^ James, Frank (November 2, 2010). "Chris Coons Defeats Christine O'Donnell In Delaware: CNN, AP". NPR. Retrieved February 19, 2025.
- ^ Chase, Randal (November 20, 2015). "Ex-Senate candidate O'Donnell: FEC lawsuit is a 'witch hunt'". Associated Press. Retrieved February 6, 2026.
- ^ Masulli Reyes, Jessica; Albright, Matthew (September 22, 2016). "Judge: Christine O'Donnell violated election law". The News Journal. Retrieved February 6, 2026.



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