Great article about the debate amongst the think tanks and getting a glimpse had how alien the AEI crowd sounded.
As to your post, if by 'WE' you mean the Clinton CIA reported that their were WMDs in 1998, then yes they did. That still does not mean he had them. There was clearly an intelligence failure; that does not, ergo, make the war illegitimate or mean 'Bush lied.'
It does mean someone needs to be fired.
Actually, it was not just the Clinton CIA. UN weapons inspectors actually found them, identified them, and gave documented proof of their existence. Saddam refused to give an accounting for what happened to these weapons, so I think it is very safe to assume they exist SOMEWHERE.
In terms of volume, what Saddam had in 1998 was not large. It could be easily stashed in a basement of some random safehouse somewhere, or an underground warehouse. Or maybe he snuk them out of the country and stashed it in the Syrian dessert somewhere. I mean he had 4 years to hide the stuff. Give them man some credit.