Following up on Corey’s piece, I want to restate a point that seems to be forgotten a lot, especially by those who went along with the Bush-Blair claims about WMDs. Until December 2002, there was plenty of behavioral evidence to suggest that Saddam had WMDs, namely the fact that he had expelled (or, more precisely, refused to co-operate with) the UN weapons inspection program. Given the benefits from being declared WMD-free, this made little sense unless he had weapons. Equally, Bush and Blair were making statements that they knew what WMDs Saddam had and fairly accurate knowledge of their location. Again, this seemed (to me, at any rate) to make no sense if they were relying on a bluff that Saddam could easily call.
All of that changed, in December 2002, when Saddam readmitted the inspectors and declared that he had no WMDs. At that point, it suddenly became obvious (again, to me, at any rate) that Bush and Blair had been making it up. I naively supposed that it would be equally obvious to everyone else, and that, as a result it would be impossible to mobilise support for war. I was particularly struck by the unanimity with which the pro-war bloggers reproduced the ever-changing propaganda lines of the Administration. No one would be surprised now, but back then, the assumption was that disputes with people like Glenn Reynolds were a matter of honest disagreement.