The fact that it led to the election of Barack Obama and that he squandered much of what had been gained, gives me pause, but I voted yes anyway.
The choice isn't between what we have now and the peace and prosperity we enjoyed before 9/11. It's between what we have now and what we would have faced if we had left Saddam in power in a post-9/11 world. By now, sanctions would have long since crumbled leaving Saddam the room he needed to refocus on his WMD programs and his destabilization efforts in the region. And with his vendetta against the US, we have every reason to believe he would have provided aid and comfort to our Islamist enemies when and where he could.
"Well, it is one thing for Bill Clinton to say, I feel your pain. It is another thing for Barack Obama to say I feel your pain that I have caused." - George Will