So how would Iraq be different if Kerry won?

Not much. This is from 1998 when Clinton was president.

* Senator John Kerry (D-MA): "I think there is a disconnect between the depth of the threat that Saddam Hussein presents to the world and what we are at the moment talking about doing. If indeed he is as significant a threat, as you heard him characterized by the president, the secretary of state, the secretary of defense -- can threaten London, threaten the peace of the Middle East, that he is really a war criminal who is already at war with the civilized world -- then we have to be prepared to go the full distance, which is to do everything possible to disrupt his regime and to encourage the forces of democracy."

Senator Kerry appearing on ABC February 22, 1998.