Bush came in thinking they had WMDs.
We came, we conquered. No WMDs apparently.
Bush is all like "WTF, HU TOLD ME THAR WERE WMDS >:( "
They're all like "idk lol", so now Bush is focusing on adding more troops to just wipe out Al-Qaeda and terrorism in Iraq/Afghanistan, capturing Osama Bin Laden and setting up democracy in Iraq.