I would rather see a president who can realise he was wrong and adapt than one who will "stay the course" no matter how ridiculous and destructive that course happens to be. So what if he voted for the war? That was the wrong decision then and is still the wrong decision now. But it was based on the wrong intelligence provided and sexed up by the Bush administration...
At least one of the two major candidates acknowledges that it was the wrong decision. They other one has lost track with reality. Probably Bush is on coke again
