At this point, I doubt very much would be different. Kerry wouldn't just leave Iraq, witout some semblence of a 'Mission Accomplished', except for real this time. Kerry would have quashed Bush's domestic policy issues (SSecurity, Gay Marriage Amend.), but it is really hard to say what Kerry would do differently, foreign policy-wise, being so early in the campaign. It is rumored that Clinton wanted to invade Iraq in 1999, but was lacking in presidential capital thanks to Monica-gate. I am of the belief that most Democrats, especially Presidential candidates, are just as prone to be hawkish as their Republican couterparts, especially when it suits them politically. Anyways, I apologize if my answer in vague.