Completely and utterly wrong.
The "legal" justification was Iraq's failure to comply with various UN resolutions regarding disarmament (among other things.) Even if we find nothing, Iraq still failed to comply with the resolutions.
One of the political justifications was the WMD.
Wrong. Iraq did comply and stated it had no WMD. Bush said that Iraq had to be invaded because it refused to show its WMD's.
It's like sending Miss Marple to the electric chair becuase she refuses to tell the police where she is hiding the bodies of her victims.