Washington, D.C. ? Former White House press secretary Scott McClellan blames President Bush and Vice President Dick Cheney for efforts to mislead the public about the role of White House aides in leaking the identity of a CIA operative.

In an excerpt from his forthcoming book, McClellan recounts the 2003 news conference in which he told reporters that aides Karl Rove and I. Lewis “Scooter” Libby were “not involved” in the leak involving operative Valerie Plame.

“There was one problem. It was not true,” McClellan writes, according to a brief excerpt released Tuesday. “I had unknowingly passed along false information. And five of the highest-ranking officials in the administration were involved in my doing so: Rove, Libby, the vice president, the president’s chief of staff and the president himself.”

Bush’s chief of staff at the time was Andrew Card.

The excerpt, posted on the Web site of publisher PublicAffairs, renews questions about what went on in the West Wing and how much Bush and Cheney knew about the leak. For years, it was McClellan’s job to field – and often duck – those types of questions.

White House press secretary Dana Perino said it wasn’t clear what McClellan meant in the excerpt. “The president has not and would not ask his spokespeople to pass on false information,” she said.