US Representative Robert Wexler (D-FL) voices his support for impeachment during testimony by former White House Press Secretary Scott McClellan about the Bush administration's run-up to the Iraq war, before the House Judiciary Committee on Capitol Hill in Washington June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan gestures as he responds to questions on his comments about the Bush administration's run-up to the Iraq war, from his book, before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan speaks during a testimony on his comments about the Bush administration's run-up to the Iraq war, from his book, before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan (R) testifies on his comments about the Bush administration's run-up to the Iraq war, from his book, before the House Judiciary Committee on Capitol Hill in Washington June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan responds to questions about his comments on the Bush administration's run-up to the Iraq war, from his book, before the House Judiciary Committee on Capitol Hill in Washington June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan retakes his seat, after a long break for House votes, to testify about his comments about the Bush administration's run-up to the Iraq war from his book before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan listens to questions about his comments about the Bush administration's run-up to the Iraq war, from his book, before the House Judiciary Committee on Capitol Hill in Washington June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan refers to his book about the Bush administration "What Happened -- Inside the Bush White House and Washington's Culture of Deception" while testifying before the House Judiciary Committee on Capitol Hill in Washington June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan answers questions on his comments about the Bush administration's run-up to the Iraq war, from his book, before the House Judiciary Committee on Capitol Hill in Washington June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan sits to testify about his comments about the Bush administration's run-up to the Iraq war from his book before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan waits to testify about his comments about the Bush administration's run-up to the Iraq war from his book before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan (L) is escorted by committee chairman US Rep. John Conyers (D-MI) (R) as he arrives to testify about his comments about the Bush administration's run-up to the Iraq war from his book before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan stands to be sworn in to testify about his comments about the Bush administration's run-up to the Iraq war from his book before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan (R) walks with committee chairman US Rep. John Conyers (D-MI) (L) as he arrives to testify about his comments about the Bush administration's run-up to the Iraq war from his book before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan (R) walks with committee chairman US Rep. John Conyers (D-MI) (2nd L) and attorney Michael Tigar (TOP L) as he arrives to testify about his comments about the Bush administration's run-up to the Iraq war from his book before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan's (R) attorney Michael Tigar (L) attempts to speak on his behalf before testimony about his comments about the Bush administration's run-up to the Iraq war from his book before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan takes his seat to testify about his comments about the Bush administration's run-up to the Iraq war from his book before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan (2nd L) is greeted by photographers as he takes his seat to testify about his comments about the Bush administration's run-up to the Iraq war from his book before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan smiles as he takes his seat to testify about his comments about the Bush administration's run-up to the Iraq war from his book before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan takes the oath to testify about his comments about the Bush administration's run-up to the Iraq war from his book before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

Former White House Press Secretary Scott McClellan is sworn in to testify about his comments about the Bush administration's run-up to the Iraq war from his book before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

New White House Press Secretary Tony Snow pauses as he recounts his bout with cancer during his first on-camera briefing in Washington May 16, 2006. Snow replaced Scott McClellan, who resigned after a shake up of U.S. President George W. Bush's senior aides. REUTERS/Jim Young 

New White House Press Secretary Tony Snow takes questions from reporters during his first news briefing in Washington, May 16, 2006. Snow replaced Scott McClellan, who resigned after a shake up of U.S. President George W. Bush's senior aides. REUTERS/Jim Young 

New White House Press Secretary Tony Snow takes questions from reporters during his first on-camera news briefing in Washington May 16, 2006. Snow replaced Scott McClellan, who resigned after a shake up of U.S. President George W. Bush's senior aides. REUTERS/Jim Young 

New White House Press Secretary Tony Snow takes questions from reporters during his first news briefing in Washington, May 16, 2006. Snow replaced Scott McClellan, who resigned after a shake up of U.S. President George W. Bush's senior aides. REUTERS/Jim Young 

White House Press Secretary Scott McClellan returns to his office after a short trip with President George W. Bush, May 10, 2006. Wednesday was to be McClellan's last day on the job before being replaced by Tony Snow. REUTERS/Jonathan Ernst 

Outgoing White House Press Secretary Scott McClellan leaves Air Force One for the last time in his current capacity, upon his arrival with U.S. President George W. Bush at Andrews Air Force Base from Orlando May 10, 2006. It was McClellan's last trip on Air Force One as Press Secretary before being replaced by Tony Snow. REUTERS/Jason Reed 

Outgoing White House Press Secretary Scott McClellan waves from the steps of Air Force One for the last time in his current capacity upon his arrival with U.S. President George W. Bush at Andrews Air Force Base from Orlando May 10, 2006. It was McClellan's last trip on Air Force One as Press Secretary before being replaced by Tony Snow. REUTERS/Jason Reed 

Outgoing White House Press Secretary Scott McClellan serves cookies and brownies made by his wife Jill to journalists in the press cabin of Air Force One en route from Orlando to Andrews Air Force base near Washington May 10, 2006. It is McClellan's last week trip on Air Force One as Press Secretary before being replaced by Tony Snow. REUTERS/Jason Reed 

Outgoing White House Press Secretary Scott McClellan serves cookies and brownies made by his wife Jill to journalists in the press cabin of Air Force One en route from Orlando to Andrews Air Force base near Washington May 10, 2006. It is McClellan's last week trip on Air Force One as Press Secretary before being replaced by Tony Snow. REUTERS/Jason Reed 

Outgoing White House Press Secretary Scott McClellan serves cookies made by his wife Jill to members of the press in the press cabin of Air Force One en route from Orlando to Andrews Air Force base near Washington May 10, 2006. It is McClellan's last week trip on Air Force One as Press Secretary before being replaced by Tony Snow. REUTERS/Jason Reed 

Outgoing White House Press Secretary Scott McClellan (L) steps aboard Air Force One for the last time in his current capacity at Orlando International Airport in Florida May 10, 2006. It is McClellan's last week as Press Secretary before being replaced by Tony Snow. At right is Dan Bartlett, counsellor to the President. REUTERS/Jason Reed 

Outgoing White House Press Secretary Scott McClellan is pictured through a door window behind the scenes at an event on the Medicare Prescription Drug Benefit at the Asociacion Borinquena de Florida Central in Orlando, Florida May 10, 2006. It is McClellan's last week as Press Secretary before being replaced by Tony Snow. REUTERS/Jason Reed 

White House Press Secretary Scott McClellan walks to his final daily briefing in the Brady Press Briefing Room of the White House in Washington May 5, 2006. McClellan recently announced his resignation and will be replaced by former Fox News radio host Tony Snow. REUTERS/Jason Reed 

White House Press Secretary Scott McClellan steps away from the podium for the last time after conducting his final daily briefing in the Brady Press Briefing Room of the White House in Washington May 5, 2006. McClellan will be replaced by former Fox News radio host Tony Snow. REUTERS/Jason Reed 

White House Press Secretary Scott McClellan laughs during his final daily briefing in the Brady Press Briefing Room of the White House in Washington May 5, 2006. McClellan recently announced his resignation and will be replaced by former Fox News radio host Tony Snow. REUTERS/Jason Reed 

White House Press Secretary Scott McClellan waves to reporters as he steps away from the podium for the last time after conducting his final daily briefing in the Brady Press Briefing Room of the White House in Washington May 5, 2006. McClellan will be replaced by former Fox News radio host Tony Snow. REUTERS/Jason Reed 

White House Press Secretary Scott McClellan steps off the platform after conducting his final briefing to reporters in the Brady Press Briefing Room of the White House in Washington May 5, 2006. McClellan will be replaced by former Fox News radio host Tony Snow. REUTERS/Jason Reed 

White House Press Secretary Scott McClellan smiles during his final briefing to reporters in Washington May 5, 2006. McClellan will be replaced by former Fox News radio host Tony Snow. REUTERS/Kevin Lamarque 

White House Press Secretary Scott McClellan walks away from the rostrum after conducting his final briefing to reporters in Washington May 5, 2006. McClellan will be replaced by former Fox News radio host Tony Snow. REUTERS/Kevin Lamarque 

White House Press Secretary Scott McClellan waves goodbye after conducting his final briefing to reporters in Washington May 5, 2006. McClellan will be replaced by former Fox News radio host Tony Snow. REUTERS/Kevin Lamarque 

U.S. President George W. Bush (R) walks to the Oval Office of the White House with outgoing Press Secretary Scott McClellan (C) and White House Deputy Chief of Staff Joe Hagin May 5, 2006. Bush was returning from an unscheduled trip to a local Washington hardware store to speak on new job numbers released on Friday, and the economy. REUTERS/Jason Reed 

Assistant to the President for Homeland Security and Counter terrorism Frances Townsend (R) passes White House Press Secretary Scott McClellan before she briefs the press on the "National Strategy for Pandemic Influenza Implementation Plan" report in the White House briefing room in Washington May 3, 2006. REUTERS/Larry Downing 

Tony Snow smiles as U.S. [President George W. Bush announces] that Snow would serve as the new White House press secretary in the briefing room of the White House in Washington April 26, 2006. [Snow, a Fox News Radio host, replaced Scott McClellan who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency.] 

Newly named White House press secretary Tony Snow (R) speaks after being introduced by U.S. President George W. Bush in the briefing room in Washington April 26, 2006. Snow, a Fox News Radio host, replaces Scott McClellan who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency. REUTERS/Jim Young 

New White House press secretary Tony Snow listens to his introduction by U.S. President George W. Bush in the briefing room in Washington April 26, 2006. Snow, a Fox News Radio host, replaced Scott McClellan who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency. REUTERS/Jim Young 

Outgoing White House Press Secretary Scott McClellan follows his successor Tony Snow (L) after U.S. President George W. Bush announced that Snow will serve as the new press secretary in the briefing room of the White House in Washington April 26, 2006. Snow, a Fox News Radio host, replaced McClellan who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency. REUTERS/Kevin Lamarque 

U.S. President George W. Bush announces that Tony Snow (L) will serve as his new press secretary in the briefing room of the White House in Washington April 26, 2006. Snow, a Fox News Radio host, replaced Scott McClellan (R) who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency. REUTERS/Kevin Lamarque 

New White House press secretary Tony Snow (L) and his predecessor Scott McClellan leave the briefing room of the White House in Washington April 26, 2006. Snow, a Fox News Radio host, replaced McClellan who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency. REUTERS/Jim Young 

U.S. President George W. Bush (L) waves off questions from reporters for his new press secretary Tony Snow in the briefing room of the White House in Washington April 26, 2006. Snow, a Fox News Radio host, replaced Scott McClellan who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency. REUTERS/Jim Young 

Newly named White House press secretary Tony Snow (R) speaks after being introduced by U.S. President George W. Bush in the briefing room in Washington April 26, 2006. Snow, a Fox News Radio host, replaced Scott McClellan who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency. REUTERS/Jim Young 

Outgoing White House Press Secretary Scott McClellan (R) passes behind U.S. President George W. Bush as they arrive to announce that Tony Snow will serve as the new press secretary in the briefing room of the White House in Washington April 26, 2006. Snow, a Fox News Radio host, replaced McClellan who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency. REUTERS/Kevin Lamarque 

U.S. President George W. Bush listens as Tony Snow (C) speaks to reporters after Bush announced that Snow will serve as his new press secretary in the briefing room of the White House in Washington April 26, 2006. Snow, a Fox News Radio host, replaced Scott McClellan (R) who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency. REUTERS/Kevin Lamarque 

U.S. President George W. Bush (C) announces his new press secretary Tony Snow (L) in the briefing room of the White House in Washington April 26, 2006. Snow, a Fox News Radio host, replaced Scott McClellan (R) who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency. REUTERS/Jim Young 

U.S. President George W. Bush announces that Tony Snow (L) will serve as his new press secretary in the briefing room of the White House in Washington April 26, 2006. Snow, a Fox News Radio host, replaced Scott McClellan (R) who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency. REUTERS/Kevin Lamarque 

Newly named White House press secretary Tony Snow (R) speaks after being introduced by U.S. President George W. Bush in the briefing room in Washington April 26, 2006. Snow, a Fox News Radio host, replaced Scott McClellan who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency. REUTERS/Jim Young 

Tony Snow smiles as U.S. President George W. Bush announces that Snow would serve as the new White House press secretary in the briefing room of the White House in Washington April 26, 2006. Snow, a Fox News Radio host, replaced Scott McClellan who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency. REUTERS/Kevin Lamarque 

Newly named White House press secretary Tony Snow (R) speaks after being introduced by U.S. President George W. Bush in the briefing room in Washington April 26, 2006. Snow, a Fox News Radio host, replaced Scott McClellan who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency. REUTERS/Jim Young 

Tony Snow speaks to reporters after U.S. President George W. Bush announced that Snow would serve as the new White House press secretary in the briefing room of the White House in Washington April 26, 2006. Snow, a Fox News Radio host, replaced Scott McClellan who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency. REUTERS/Kevin Lamarque 

Newly named White House press secretary Tony Snow smiles after being introduced by U.S. President George W. Bush in the briefing room in Washington April 26, 2006. Snow, a Fox News Radio host, replaced Scott McClellan who announced his resignation last week as part of a staff shake-up engineered by new White House Chief of Staff Josh Bolten aimed at reviving Bush's presidency. REUTERS/Jim Young