In september of 2002 the head of the CIA breifed President Bush that Iraq did not have WMD. Congress was not told. The people were not told. The world did not believe he had them..
No he didn't. Scott Ritter made those claims, in public, in September 2002. However, most of the intel, and the UN inspections, spoke against his claims. Sadaam was not and had never been in full compliance with the cease-fire demands for weapons destruction. He never satisfactorily showed desctruction of the chemical weapons they had and had produced forever or the destruction of the biological agents he denied having at first but were shown to exist.
Clinton believed they existed in 1996 and in 1998. There were no inspecitons from 1998 to 2002 and when they resumed it was stalling and denial of access and no proof of destruction (as was required). Yes, there was faulty intel. Yes evidence for WMDs was unjustly given more weight than evidence against. But these were honest errors, not lies.
And due to 12 years of non-compliance with the cease-fire, the invasion was justified regardless of any stockpiles of WMDs and Clinton should have pulled the trigger back in 98.