Well this doesn't need to be long because it's not tough to understand.
The Democrats are on the verge of their "Katrina" moment by betraying every hope of their constituents.
And the GOP is free to roll out a strategy that worked for them twice before.
Eisenhower won in 1952 by promising to end Truman's war in Korea. And he really ended the war, by partition Korea.
Nixon won in 1968 based on his secret "plan to end the Vietnam war," which believe me, sounded as nutty then as it does now.
For the GOP to win in a landslide, the GOP candidate just needs to have one of those head-slappingly bogus come-to-Jesus-moments that the GOP loves so much and say "Jesus told me to end this war."
And that'll leave the Democratic candidate standing there stammering, because the Democratic base has already been alienated by "moderate" hawkishness and they aren't prepared to buy a hokey change of position. At that point the Democrats can just fold their tent and go home.
You think the GOP can't do this? They did it twice before.
In terms of timing, this would have to happen after the convention. During the primary, all the candidates would stay pro-war. Then after the convention, the nominee would declare an anti-war epiphany. It could happen as late as September 2008, and probably the later the better. The press would swoon, the GOP would fall into line, and the Democrats would vanish.