World's Worst Liar

The "Bush Lied" accusation by political opponents concerning weapons of mass destruction is easily refuted thusly:
In order to believe "Bush lied" one must believe he followed this course:

Knowing a priori that Iraq had no such weapons, he invaded Iraq anyway.

He made no effort to cover up his lie by ensuring that such weapons would be found.

Say what you will about George W. Bush, but it strains credibility to assert that he would knowingly lie about the grounds for war, and subsequently go to war with no plan to substantiate his knowingly unfounded grounds. I would argue that the lack of WMD in Iraq is proof of Bush's sincerity, rather than vice verca. If he had known there were no WMD in Iraq, and was still hell-bent on war, he would have either made another argument or made sure WMD were found. He did neither.