There was no false pretense.
First, every other nation in the world affirmed that Iraq was involved with WMDs.
There are other things, as well. Numerous documents have been found showing the capacity for rapid start-up of a WMD program was part of Saddam's strategy. They retained the industrial and chemical base to do so.
Numerous delivery systems for WMDs have been found. This is the most significant issue, since WMDs themselves degrade.
Recent actions by the head of US intelligence to close off documents about Iraqi nuclear research demonstrates that Iraq retained the capacity and desire for nuclear weaponry.
Extensive international terrorist ties have been proven.
Finally, the Congressional resolution gave the president authority to wage war whereever he judged was necessary.
The false pretense argument doesn't work with me.
If that were the real reason, why the shifting bumper-sticker slogans to justify the war? If Bush said "we did the only responsible thing, and acted based on the information we had at the time," I'd believe that. But his justifications have shifted to making the world safe for democracy to fighting the terrorists there so we don't fight them here to "cut and run."