The national polls are meaningless. Study those few, crucial state polls carefully to tell you what you need to know. The more I look at it the more I once again think FLORIDA FLORIDA FLORIDA. The winner of FLORDIA wins this election. I think Ohio is in Bush's column. Another way to look at it is the winner will take at least 2 out of 3 of Ohio, Penn, Fla. Ohio goes Bush and Penn goes Kerry. Florida decides the winner once again. Slight difference from 2000 though could be if Kerry wins Fla he wins narrow instead of big like Gore would have with Fla.
It's pretty simple really, there won't be many chagnes from 2000 and Kerry needs to pick up 10. Fla gives him 27 so he could even shed 17 (e.g. Wisc and Iowa) and still win.
Ignore the national polls and watch the Florida ones carefully.