It is said that a big lie can work if it is repeated often enough. For weeks, leading Democrats have been hammering away at the Big Lie that George W. Bush lied about weapons of mass destruction in Saddam Hussein's Iraq. Starting on Veterans Day, Bush, Dick Cheney, and others in the administration embarked on a "pushback," arguing that Bush--and many leading Democrats, including some now part of the Big Lie campaign--accurately characterized the intelligence at the time. Bush, Cheney, and the administration have the truth on their side. Exhaustive and authoritative examinations of the prewar intelligence, by the bipartisan...