My opinion... "Oh well..." It was a way to get rid of the terrorist sypathizer leader Saddam who was overdue for an extreme arse kicking as well as have a central location in the Middle east vital to promoting democracy. Though many Americans wont like my opinion.
I think it does make the administration look bad. I don't think anyone lied, but Bush, Cheney, Powell and Rumsfeld swore up and down that Iraq had WMD, so the intelligence was obviously wrong.
The fact is that Saddam was not cooperating with the UN, and that alone was enough in my mind to go in there. After years of his BS, we finally said 'Enough!'