"George W. Bush is a liar. He has lied large and small, directly and by omission," David Corn writes in the Nation. "Bush's truth-defying crusade for war did not mark a shift for him. Throughout his campaign for the presidency and his years in the White House, Bush has mugged the truth in many other areas to advance his agenda. Lying has been one of the essential tools of his presidency. To call the forty-third President of the United States a prevaricator is not an exercise of opinion, not an inflammatory talk-radio device.