"Bush's ffort to secure its oil supply." Terribus did a pretty good job of pointing out that Iraq was not important to U.S. oil supply. Check production figures for the period any one will find that he is correct.
Sanctions and the invasion disrupted supplies to southern Europe but not to North America.

I believe that the invasion, as it was carried out, was ill-advised, but Saddam had to be removed. The UN Security Council was offering no solutions. Saddam, with the invasion of Kuwait, the war with Iran and other actions, was destabilizing the entire region.