The Delaware U.S. Attorney’s office is looking into allegations that Tea Party candidate Christine O’Donnell has used funds from her failed Senate campaigns to pay personal expenses, the Associated Press reported.

The AP reported that the office confirmed it is reviewing a complaint about O’Donnell’s campaign spending made this year by Citizens for Responsibility and Ethics in Washington. However, officials in the office headed by U.S. Attorney Charles M. Oberly have declined to say whether a criminal investigation is taking place.

CREW has claimed she improperly used more than $20,000 in campaign funds to pay her rent and other personal expenses, the AP reported.

O’Donnell has denied the misuse of campaign funds and has said her campaign staff and lawyer have not been informed of a federal investigation.

She said the accusations are politically motivated and driven by Vice President Joe Biden, who was a senator from Delaware for more than 30 years. Biden in 2008 ran simultaneously for re-election to the Senate and for vice president; he faced O’Donnell in the Senate race and defeated her with 65 percent of the vote. He later resigned the seat to become vice president.

Zane D. Memeger (Morgan Lewis)

Zane D. Memeger, a former Assistant U.S. Attorney, is expected to be nominated for U.S. Attorney for the Eastern District of Pennsylvania, while Charles M. Oberly III, a former state attorney general, is expected to be nominated for Delaware’s U.S. Attorney, The Philadelphia Inquirer reports.

The newspaper reports that Memeger was recommended by Pennsylvania Sens. Bob Casey and Arlen Specter, both Democrats, according to the sources with knowledge of the selection process. He will have to pass his FBI background check before President Obama sends his nomination to the Senate.

Memeger was an Assistant U.S. Attorney in the district for 11 years before leaving in 2006 to join Philadelphia-headquartered Morgan Lewis, where he is now a partner, The Inquirer reports. His practice focuses on corporate and white collar crime. While in the U.S. Attorney’s office, Memeger served on the organized crime strike force. He was on the team that successfully prosecuted mobster Joey Merlino and  Imam Shamsud-din Ali on racketeering charges, according to the Inquirer.

Charles M. Oberly III (Drinker Biddle)

The Eastern District office has been vacant since Pat Meehan resigned in July 2008 to explore a bid for the Republican nomination for governor of Pennsylvania. But he’s now running for the House seat being vacated by Rep. Joe Sestak (D), who is challenging party-switching Sen. Arlen Specter in the Democratic primary next year. The district’s current interim U.S. Attorney is Michael L. Levy.

Meanwhile, Oberly, who is now of counsel with the Wilmington office of the firm Drinker Biddle, is expected to be nominated within a month, according to the Inquirer’s sources. Oberly was the Delaware attorney general from 1983 to 1985. He had a failed bid for U.S. Senate in 1994.