John Podesta, co-chair President-elect Obama's transition team, left, stands with White House Chief of Staff Joshua Bolten as Obama and President Bush, both not pictured, met at the White House in Washington, Monday, Nov. 10, 2008. (AP Photo/Charles Dharapak)

In this Feb. 7, 2005 file photo, Joshua Bolten, director of the Office of Management and Budget, outlines President Bush's $2.57 trillion spending plan for fiscal year 2006, at the Eisenhower Executive Office Building, part of the White House complex, in Washington. (AP Photo/J. Scott Applewhite, File)

White House Chief of Staff Joshua Bolten listens during President Bush's meeting with King Hamad bin Isa Al-Khalifa of Bahrain, Tuesday, March 25, 2008, in the Oval Office of the White House in Washington. (AP Photo/Gerald Herbert)

White House Chief of Staff Joshua Bolten speaks in the Eisenhower Executive Office Building in Washington in this Feb. 7, 2005 file photo. House Speaker Nancy Pelosi of calif. has asked for a grand jury investigation into whether Bolten and former counsel Harriet Miers should be prosecuted for contempt of Congress. (AP Photo/J. Scott Applewhite, File)

White House Chief of Staff Joshua Bolten speaks in the Eisenhower Executive Office Building in Washington in this Feb. 7, 2005 file photo. House Speaker Nancy Pelosi of calif. has asked for a grand jury investigation into whether Bolten and former counsel Harriet Miers should be prosecuted for contempt of Congress. (AP Photo/J. Scott Applewhite, File)