On a purely hypothetical note, could you imagine the caterwauling that would go on in the "North" today if they had to fight the Civil War, especially if it divided along Red/Blue state lines? I would imagine that most of the "Red" Western states would join a secession movement from the "enlightened Blue" "North". It would be rather funny to watch the anti-war Norther elite-types struggling between the desire to preserve the "Union" and their pacifist "principles".
It tickles me just thinking about it...
It would be a disaster for the blue side.
Keep in mind that what you have are "pockets" of blue in those states and due to the large populations centered in those pockets, the state goes blue, but geographically, most of the state would be red.
President Bush captured the popular vote in 85% of the land mass in the 48 states.
That 15% that Kerry carried was all the large cities and a few pockets here and there.
For the sake of arugement we'll leave out alaska and hawaii.