the benefit of the doubt, then changed their minds...

"Mr. President, when I vote to give the president of the United States the authority to use force, if necessary, to disarm Saddam Hussein; because I believe that a deadly arsenal of weapons of mass destruction in his hands is a threat and a grave threat to our security and that of our allies in the Persian Gulf region, I will vote, because I believe it is the best way to hold Saddam Hussein accountable." .... John Kerry

http://www.democracynow.org/2004/2/20/john_kerry_now_kerry_backs_iraq

And Greenwald and Franken, unlike those who actually voted approval, didn't have access to the 93 page intelligence report that contained: "dissents from agencies questioning some of the more sweeping conclusions. For example, the State Department said the evidence that Iraq was reconstituting its nuclear program was "inadequate."

http://pcl.stanford.edu/press/2004/lat-conflicted.html