Bush NEVER said ONCE that WMD was the only reason.
Right!! The Bush administration's presentation to Congress under the War Poswers act listed 21 or 22 reasons. WMD programs were only one reason. And the resolution lumped Iran's violation of 6 UN resolution as only one reason.
Here's one link confirming this - to PBS no less.
It's now Obama's to screw up - as is Afghanistan.