Christine O'Donnell

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Failed U.S. Senate candidate Christine O'Donnell denies accusations that she misspent campaign funds and suspects a political smear. (Associated Press)

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Delaware Republican Senate candidate Christine O'Donnell is being investigated by federal prosecutors. (Associated Press)

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FILE - In this Nov. 2, 2010 file photo, Delaware Republican Senate candidate Christine O'Donnell waves before giving her concession speech to supporters in Dover, Del. O'Donnell will offer her take on the campaign and her ''frustrations'' with the political process, St. Martin's Press announced Thursday, Dec. 2, 2010. Publication is scheduled for August 2011. (AP Photo/Rob Carr, file)

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Associated Press Former Delaware Republican Senate candidate Christine O'Donnell will keynote a Northern Virginia Tea Party banquet on Tuesday.

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Delaware Republican Senate candidate Christine O'Donnell (left) is consoled by brother Dan and sister Jennie after conceding the Diamond State election to her Democratic opponent on Tuesday, Nov. 2, 2010, in Dover, Del.

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Sen.-elect Chris Coons, Delaware Democrat, celebrates his win over Christine O'Donnell at an election-night rally in Wilmington, Del., on Tuesday. Mr. Coons is joined on stage by wife Annie and two of his children.

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Christine O'Donnell has 10-1 odds against winning the Senate seat in Delaware on Nov. 2, says Ireland-based bookmaker Paddy Power. (Associated Press)

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Republican Senate candidate Christine O'Donnell responds to Democratic rival Chris Coons in a nationally televised debate at the University of Delaware in Newark on Wednesday night. They are vying for the seat formerly held by Vice President Joseph R. Biden Jr. (Associated Press)

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Christine O'Donnell can count on support from the "tea party," but not the fellow Republican she defeated.

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** FILE ** Delaware Republican Senate candidate Christine O'Donnell speaks at a Sussex County Republican Committee picnic on Sunday, Sept. 19, 2010, in Lincoln, Del. (AP Photo/Jessica Kourkounis)

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** FILE ** Delaware Republican Senate candidate Christine O'Donnell addresses supporters during a rally on Friday, Oct. 1, 2010, at her new campaign headquarters in Wilmington, Del. (AP Photo/Rob Carr)

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Associated Press CREW SOCKS: Christine O'Donnell, Delaware GOP nominee for Senate, is under fire by Citizens for Responsibility and Ethics in Washington.

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Delaware Republican Senate candidate Christine O'Donnell speaks at a Sussex County Republican Committee picnic on Sunday, Sept. 19, 2010, in Lincoln, Del. (AP Photo)

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ASSOCIATED PRESS Christine O'Donnell, Delaware's Republican candidate for U.S. Senate, attends the Sussex County Republican Committee picnic at Dave Wilson's Auction on Sunday in Lincoln. She said she canceled Sunday TV talk-show appearances to campaign at events in her state.