With liberals concentrated in the cities and conservatives dominating the countryside, you're proposing a really weird-looking map.
It's even a little more complicated than that. Remember the Democratic Party primary, where Sanders won so many exurban and rural areas. New York state was particularly interesting, where Sanders won handily in low-population areas, but Clinton won the population centers by a *ahem* country mile. If you look at Massachusetts by town, you'll see a thick red stripe down the middle, of working-class and poor towns that voted for Trump in the general election.
Well there is something to be said for geographical continuity. I mean, wecan't divide the US on just ideological or economic lines alone. That's also why it would make sense for some kind of "grace period" during the dissolution where government sponsored relocation programs could be made available for those who want to live somewhere more ideologically, economically, or socially closer to what they want.
Is there any reason we can't do that now, without literally ripping the country into pieces? One of the problems poor and working-class people face all across this country is that they can't move. They're un- or under-employed, underwater on mortgages, have no credit, and out-of-date job skills, and can't pack up because they can't afford to. Just anecdotally, I heard about one guy in a flood-prone area (it might have been Houston, which was in the news so much last year) who keeps getting federal money to rebuild his house every time it floods, which has been every year. He doesn't even
want the house anymore, but nobody will buy it because, duh, it floods every year, and he stills owes the bank money on it. I don't know how common his story is.
Assuming the breakup is peaceful, I would certainly like to see the new nations maintain a strong economic relationship. Something similar to the Eurozone. Keep the common currency and still allow citizens of the former US to travel freely among the successor states.
I'm not sure the Eurozone is exactly a model right now. I mean, why would a prosperous region like the Northeast want to be in a simple trade relationship with Mississippi or Oklahoma? Can those states really support themselves without the rest of us? We put more money into the federal coffers than we take out, and I don't know if the farming states want to replace that with whatever trade deals they can negotiate with us.
So, without a Federal Union, you'd be dooming huge swaths of people to perpetual poverty for the same reason why the internal regions of Africa are so poor.
Bingo. I think California would be one of the world's top economies without the rest of us dragging them down, and there are parts of the US that are already an inch from being "3rd-world" countries.