Attorney General Michael Mukasey leaves George Washington University Hospital in Washington, Friday, Nov. 21, 2008. (AP Photo/Kevin Wolf)

Attorney General Michael Mukasey leaves George Washington University Hospital in Washington, Friday, Nov. 21, 2008. (AP Photo/Kevin Wolf)

Attorney General Michael Mukasey, accompanied by his wife Susan, leaves George Washington University Hospital in Washington, Friday, Nov. 21, 2008. (AP Photo/Kevin Wolf)

Attorney General Michael Mukasey is pictured in the Oval Office at the White House in Washington, during a photo opportunity with President Bush, not pictured, in this Wednesday, Oct. 22, 2008 file photo. Mukasey, the no-nonsense former federal judge who took over the Justice Department after Alberto Gonzales resigned in disgrace, collapsed during a speech Thursday night Nov. 20, 2008 and was rushed to a hospital after losing consciousness. (AP Photo/Charles Dharapak)

In this Wednesday, Dec. 19, 2007 file photo, Attorney General Michael Mukasey addresses the American Bar Association's Standing Committee on Law and National Security, at the University Club in Washington. Mukasey collapsed during a speech Thursday night, Nov. 20, 2008 and was being taken to a hospital. (AP Photo/Gerald Herbert)

In this Friday, March 28, 2008 file photo, Attorney General Michael Mukasey speaks in San Jose, Calif. Mukasey collapsed during a speech in Washington, Thursday, Nov. 20, 2008. (AP Photo/George Nikitin)

In this Oct. 25, 2005 file photo, Assistant U.S. Attorney Nora Dannehy speaks to reporters outside U.S. District Court in New Haven, Conn. Attorney General Michael Mukasey appointed, Dannehy, a career prosecutor, to direct the probe a prosecutor Monday, Sept. 29, 2008, to pursue possible criminal charges against Republicans who were involved in the controversial firings of U.S. attorneys. (AP Photo/Bob Child, File)

U.S. Attorney General Michael Mukasey, left, faces reporters as Michael Sullivan, U.S. attorney general for Massachusetts, right, looks on during a news conference, in Boston, Tuesday, Aug. 5, 2008. The Department of Justice announced Tuesday that it had charged 11 people in connection with the hacking of nine major U.S. retailers and the theft and sale of more than 40 million credit and debit card numbers. The retailers included TJX, BJ's Wholesale Club, OfficeMax, and Boston Market among others. (AP Photo/Steven Senne)

House Judiciary Committee Chairman Rep. John Conyers, D-Mich., waits to start a hearing on Capitol Hill in Washington, Wednesday, July 23, 2008, with Attorney General Michael Mukasey. (AP Photo/Susan Walsh)

Attorney General Michael Mukasey testifies on Capitol Hill in Washington, Wednesday, July 23, 2008, before the House Judiciary Committee hearing on oversight at the Justice Department. (AP Photo/Susan Walsh)