5. Bush "lied" in making the case for war. I have addressed this myth before. It is a staple of the anti-Iraq/anti-Bush commentary -- and not just of the pseudonymous trolls in blog comment sections. John Mearsheimer, one of the most influential security studies academics, has written a book built around the claim that leaders regularly lie and that Bush in particular lied about Iraq. Mearsheimer claims "four key lies," each one carefully rebutted by Mel Leffler.
The first is the question of links between Iraq and al Qaeda. As I noted above, while the Iraq files contain no "smoking gun" of an active operational link, the record includes ample evidence of overtures originating from either side -- each pursuing precisely the kind of enemy-of-my-enemy-is-my-friend alliance of convenience that Bush worried about.
The second is the Bush administration statements of certainty about Iraq's WMD programs. It turns out the Bush administration officials were wrong on many of those particulars and should have been less certain about how they were reading the intelligence, but there is no compelling evidence that they knew they were reading the intelligence incorrectly, which is what is logically required to prove the charge of "lying" rather than being "mistaken."
The third is the charge that Bush claimed Saddam was behind the attacks of 9/11. Here Mearsheimer ignores the explicit and repeated explanation by President Bush (and countless administration figures) about what they meant -- namely that the links they saw were (i) how 9/11 had changed their risk calculus and (ii) how terrorist groups and states sponsors of terror should be treated as part and parcel of the same war. Again, the Bush administration may or may not have been wrong to view things that way but these are disputes of reasoning and policy, not fact.
The fourth is the charge that Bush "lied" about sincerely pursuing a diplomatic solution short of war in 2002-2003. In fact, Bush was committed to a final resolution of WMD issue, which he believed would require either abject capitulation by Hussein or forcible regime change. Bush was not open to a wide range of face-saving and half-way diplomatic measures, but he never claimed to be. In other words, Bush was not willing to accept diplomatic solutions that others might have accepted, but he did go to great lengths to secure the diplomatic solution he was willing to accept but Saddam was not.