Attorney General Eric Holder speaks before a meeting of the National Association of Attorneys General on Tuesday. Manuel Balce Ceneta/AP hide caption

itoggle caption Manuel Balce Ceneta/AP

Caitlin J. Halligan, shown in 2005, waited more than 700 days in the last Congress for a vote on the Senate floor before she was filibustered, the White House says. She was nominated again last month. Jim McKnight/AP hide caption

itoggle caption Jim McKnight/AP

In this 1971 file photo, the real-life Frank Serpico (center, with beard) appears at a hearing during an investigation into police corruption in New York City. Jim Wells/AP hide caption

itoggle caption Jim Wells/AP