It takes a bullshit artist to know that someone else is a bullshit artist. For a few years, Scott McClellan was a national laughingstock as President Bush's spokesman. It was McClellan who had to defend the indefensible and bob and weave after reporters began asking too many questions about the administration's shenanigans. But we all knew that McClellan was just the spokesman and that, hey, someone's gotta answer the questions.

McClellan is now calling shenanigans on Bush and Co., in a new memoir.

Former White House press secretary Scott McClellan writes in a new memoir that the Iraq war was sold to the American people with a sophisticated "political propaganda campaign" led by President Bush and aimed at "manipulating sources of public opinion" and "downplaying the major reason for going to war."

McClellan includes the charges in a 341-page book, "What Happened: Inside the Bush White House and Washington's Culture of Deception," that delivers a harsh look at the White House and the man he served for close to a decade. He describes Bush as demonstrating a "lack of inquisitiveness," says the White House operated in "permanent campaign" mode, and admits to having been deceived by some in the president's inner circle about the leak of a CIA operative's name.

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[I]n a chapter titled "Selling the War," he alleges that the administration repeatedly shaded the truth and that Bush "managed the crisis in a way that almost guaranteed that the use of force would become the only feasible option."

"Over that summer of 2002," he writes, "top Bush aides had outlined a strategy for carefully orchestrating the coming campaign to aggressively sell the war. . . . In the permanent campaign era, it was all about manipulating sources of public opinion to the president's advantage."

McClellan, once a staunch defender of the war from the podium, comes to a stark conclusion, writing, "What I do know is that war should only be waged when necessary, and the Iraq war was not necessary."

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Bush is depicted as an out-of-touch leader, operating in a political bubble, who has stubbornly refused to admit mistakes. McClellan defends the president's intellect -- "Bush is plenty smart enough to be president," he writes -- but casts him as unwilling or unable to be reflective about his job.

"A more self-confident executive would be willing to acknowledge failure, to trust people's ability to forgive those who seek redemption for mistakes and show a readiness to change," he writes.

In another section, McClellan describes Bush as able to convince himself of his own spin and relates a phone call he overheard Bush having during the 2000 campaign, in which he said he could not remember whether he had used cocaine. "I remember thinking to myself, 'How can that be?' " he writes.