Both Hillary Clinton & John Edwards voted to authorize Bush to go to war. Those who treat this decision as a litmus test of their judgement are being a bit superficial. The information at the time was that Iraq had WMD. Not authorizing Bush would have weakened the U.S. diplomatically. It was a reasonable choice that most Senators made.
If Obama had been in the Senate at the time, he might very well have voted to authorize. "I was not in the Senate, so perhaps the reason I thought it was such a bad idea was that I didn’t have the benefit of U.S. intelligence", he conceded in a New Yorker Magazine interview.
“Not only was the idea of an invasion increasingly popular, but on the merits I didn’t consider the case against war to be cut-and- dried.”
Audacity of Hope
And excuse my cynicism, but Clinton and Edwards are obviously politically ambitious, and voting to authorize was the (seemingly) politically wise choice at the time for someone seeking to be Commander in Chief. Perhaps a politically ambitious fellow like Obama would have done the same.
http://thepage.time.com/clinton-camp...-war-comments/