Just answer and respond to the lie he told during his 2003 State of the Union Address. That is what made Iraq different from all the other countries with WMD's, such as Iran, Syria, N. Korea, etc. The claim that Saddam was giving aid and protection to al Qaeda was the gave changer and key element for invasion.President Bush.
acted on the intelligence (?) he was given by a demorat operative, and nearly ALL the demorats in congress agreed, Saddam had to go because of his "Weapons of Mass Destruction".., various chemical gasses which he used on his OWN citizens, not once but several times.
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Its what everyone believed at the time. Both Clintons said exactly the same things.