A big divide among Democrats in the coming years will, I think, have a bit less to do with the substance of Iraq policy than just their analysis of what's going to happen. A lot of Democrats seem to think that this very thorny problem will, conveniently, just kind of go away without them needing to do anything about it. Either Jim Baker or John Warner or Bush 41 or someone is going to clean up the mess.
But the mess isn't going to get cleared up, not even when Candidate McCain comes up with his secret plan to end the war.