Why It's Important To Rehash the WMD Argument?

No WMD, no War Powers Resolution.
No WMD, no UN Res. 1441.
No WMD, no Coalition of the Willing.
No WMD, no Azores ultimatum.
Everything hinged on Iraq's possession of WMD, and her intransigent refusal to give them up.
Scratch the surface of any auxiliary casus belli, and chances are you'll find a circular argument: "Saddam is evil and dangerous. How do we know? Because he has WMDs. How can we be so sure he has WMDs? Because he's evil and dangerous."