Enlarge By Rob Carr, AP Delaware Republican Senate candidate Christine O'Donnell waves before giving her concession speech to supporters in Dover on Nov. 2. WILMINGTON, Del.  Former Republican Senate nominee Christine O'Donnell blamed "disgruntled" former employees Thursday for a federal investigation into her campaign spending. In a series of television interviews Thursday, O'Donnell said that two former employees had falsely alleged that she used donations to her failed 2008 Senate campaign for personal expenses, including her rent, utilities, travel and food. The TV appearances came a day after The News Journal reported that federal authorities are probing whether O'Donnell illegally used campaign donations to pay personal bills. She backed away from assertions she made Wednesday that Vice President Joe Biden orchestrated an FBI investigation against her. "Not necessarily the vice president, but look at who's behind the two complaints that have been filed" with the Federal Election Commission, O'Donnell said on Fox News' Fox & Friends. The watchdog group Citizens for Responsibility and Ethics in Washington (CREW) filed a campaign finance complaint in September with federal elections officials and prosecutors, alleging that O'Donnell stole up to $20,000 from her campaign coffers for personal expenses. The Delaware Republican Party filed a separate complaint prior to O'Donnell's upset victory over Rep. Mike Castle in the September GOP Senate primary, claiming she was illegally coordinating with an outside group. In three TV interviews Thursday on different networks, O'Donnell lashed out at former campaign workers David Keegan and Kristin Murray, blaming them for the campaign spending investigation. "You have to look at the credibility of their sources," O'Donnell said on ABC's Good Morning America. "I'm confident that we have always done everything to comply with all of the rules and regulations, and I'm confident that we will be cleared of any charges." O'Donnell continued to assert that CREW's complaint was politically motivated because the group gets donations from the Open Society Institute, founded by billionaire George Soros, a financier of liberal causes. Melanie Sloan, executive director of CREW, said her group targets corrupt Republicans and Democrats equally. Recently, it named Democratic Rep. Charlie Rangel of New York one of the most corrupt politicians in Congress. Sloan said O'Donnell is bringing up Soros to deflect attention from her campaign expenses. "Mr. Soros and I are not in touch," Sloan said Thursday. "She doesn't want to address the fact that she was stealing from the campaign." On Fox News, O'Donnell asserted that Sloan was directly connected to Biden's inner circle, calling her "a former Biden staffer." Sloan was a staff member of the Senate Judiciary Committee in 1993 when Biden chaired the panel. "By no means, Mr. Biden and I are not in touch," Sloan said. "I have not spoken to him in many, many years ... and I was not high up on the totem pole" on the Judiciary Committee. O'Donnell retained nearly $924,000 of the $7.3 million she raised this year in her failed Senate campaign against Democrat Chris Coons to use for legal defense and to start her own political action committee. Keegan said he raised funds and was assigned to put together a campaign budget for O'Donnell in the summer of 2008, during her failed Senate campaign against Biden. CREW's criminal complaint included an affidavit Keegan signed that said O'Donnell used campaign cash in 2008 for rent, meals, gas and a bowling outing. O'Donnell described Keegan as a "disgruntled" volunteer, even though records show he was paid. "He gave so many people on the team the creeps that we had to let him go," O'Donnell said on NBC's Today Show. Keegan, who lives in Hockessin, said O'Donnell is the one who is disgruntled and in denial. "That's a load of crap," Keegan said of O'Donnell's comments. "She's very paranoid, obviously, to begin with." "During the campaign, she was asking other employees to put campaign expenses on their personal credit cards and pay for stuff out of their own pockets," Keegan said. Murray, a former executive director of the Delaware Republican Party, worked for O'Donnell briefly during the 2008 campaign. Just days before O'Donnell's victory in this year's Sept. 14 primary, Murray recorded a robocall for the Delaware GOP, which was campaigning vigorously against O'Donnell because Castle was endorsed by delegates at the state GOP convention. "As O'Donnell's manager, I found out she was living on campaign donations — using them for rent and personal expenses, while leaving her workers unpaid and piling up thousands in debt," Murray said in the automated phone message sent to Delaware voters. "She wasn't concerned about conservative causes. O'Donnell just wanted to make a buck." Murray did not return requests seeking comment Thursday. O'Donnell said she fired Murray "after a week and a half for incompetence." Several O'Donnell campaign workers in 2008 complained of not being paid or reimbursed for expenses until 2009 or earlier this year, when O'Donnell's tea party fame started generating tens of thousands of dollars in out-of-state donations, Keegan said. Guidelines: You share in the USA TODAY community, so please keep your comments smart and civil. Don't attack other readers personally, and keep your language decent. Use the "Report Abuse" button to make a difference. 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