The title of former Bush flak Scott McClellan’s new book, “What Happened” brings to mind the title of O.J. Simpson’s recent allegedly fictional memoir, “If I Did It.”

Perhaps it’s because both books seek to exonerate their authors from much deserved guilty verdicts — both in the court of public opinion and in courts of law, certainly in O.J.’s case, and maybe even for Scotty too.

Here’s an excerpt from Scotty’s book:

The most powerful leader in the world had called upon me to speak on his behalf and help restore credibility he lost amid the failure to find weapons of mass destruction in Iraq. So I stood at the White House briefing room podium in front of the glare of the klieg lights for the better part of two weeks and publicly exonerated two of the senior-most aides in the White House: Karl Rove and Scooter Libby.

There was one problem. It was not true.

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

And this was not just run of the mill political spin. Rove, Libby, Ari Fleischer and others, including Colin Powell’s righthand man Richard Armitage, leaked the secret identity of a CIA agent whose specialty was tracking WMD. And they did it at the behest of the vice president who eagerly jeopardized state secrets for the tawdriest of purposes: to do political damage to the agent’s husband, Joe Wilson, because he had dared to expose a lie told by the president in his 2003 State of the Union speech about Iraq seeking uranium from Niger.

The CIA, of course, can’t reveal how many illegal weapons were successfully transported into the Middle East or how many foreigners acting as U.S. agents were permanently sidelined — or captured or killed — as a result the treasonous act of outing Agent Plame by George Bush, Dick Cheney and their henchmen.

Only Armitage has expressed regret about the leak.

Scott McClellan shredded his credibility for Bush, Cheney and the rest. Surely he can’t expect anyone to believe he is telling the truth now when he was misled by these same people. He is either the most gullible person to walk the planet, or he thinks the rest of us are fools.