Other White House officials who also attended the meeting with Cheney and President Bush included former White House Chief of Staff Andrew Card, then-National Security Adviser Condoleezza Rice, her former deputy Stephen Hadley, and Deputy White House Chief of Staff Karl Rove.
The revelation puts a new wrinkle into Special Prosecutor Patrick Fitzgerald's two-year-old criminal probe into the leak and suggests for the first time that President Bush knew from early on that the vice president and senior officials on his staff were involved in a coordinated effort to attack Wilson's credibility by leaking his wife's classified CIA status.
Now that President Bush's knowledge of the Plame Wilson affair has been exposed, there are thorny questions about whether the president has broken the law - specifically, whether he obstructed justice when he was interviewed about his knowledge of the Plame Wilson leak and the campaign to discredit her husband.
Details of President Bush's involvement in the Plame Wilson affair came in a 39-page court document filed by Fitzgerald late Wednesday evening in US District Court in Washington.
Libby's attorneys have in the past months have argued that the government has evidence that would prove Libby's innocence and that the special prosecutor refuses to turn it over to the defense. Fitzgerald said in court documents he has already turned over thousands of pages of evidence to Libby's attorneys and that further discovery requests have been overly broad.
The attorneys and officials close to the case said over the weekend that the hastily arranged meeting was called by Cheney to "brief the president" on Wilson's increasing public criticism about the White House's use of the Niger intelligence and the negative impact it would eventually have on the administration's credibility if the public and Congress found out it was true, the sources said.
Bush said publicly in October 2003 that he had no idea who was responsible for unmasking Plame Wilson to columnist Robert Novak and other reporters. The president said that he welcomed a Justice Department investigation to find out who was responsible for it.
But neither Bush nor anyone in his inner circle let on that just four months earlier, they had agreed to launch a full-scale campaign to undercut Wilson's credibility by planting negative stories about his personal life with the media.
A more aggressive effort would come a week or so later when Cheney - who, sources said, was "consumed" with retaliating against Wilson because of his attacks on the administration's rationale for war - met with President Bush a second time and told the president that there was talk of "Wilson going public" and exposing the flawed Niger intelligence.
It was then that Cheney told Bush that a section of the classified National Intelligence Estimate that purported to show Iraq did seek uranium from Niger should be leaked to reporters as a way to counter anything report Wilson might seek to publish, these sources said.
One attorney close to the case said that Bush gave Cheney permission to declassify the NIE and that Cheney told Libby to leak it to Bob Woodward, the Washington Post's assistant managing editor, which Libby did on June 27, 2003.
But Woodward told Libby shortly after he received the information about the NIE that he would not be writing a story about it for the Post but that he would use the still classified information for the book he was writing at the time, Plan of Attack.