I'd have to go for the Blue. You've got DC, you've got Texas, and you've got Florida. There are a lot of military installations there, and I'm pretty sure you reeeeally don't want to have NASA against you in a civil war.
As for Kieron's opinion on Hawaii and Alaska,
A) Remember Pearl Harbor
B) Who's going to attack from Alaska? The only thing Alaska would be usable for in a war is the oil, because there's pretty much nobody home up there. Also, Canada is not a factor because you can't use a land invasion on Alaska. Juneau, the capital, actually has no roads leading out of it, and there's of course the Yukon mountains.
As for Kieron's opinion on Hawaii and Alaska,
A) Remember Pearl Harbor
B) Who's going to attack from Alaska? The only thing Alaska would be usable for in a war is the oil, because there's pretty much nobody home up there. Also, Canada is not a factor because you can't use a land invasion on Alaska. Juneau, the capital, actually has no roads leading out of it, and there's of course the Yukon mountains.