I think a new civil war is a distinct possibility, but not along north/south lines. The most likely scenario, IMHO, is along the lines of what Crafter_Man suggested. A conservative government attempting to heavily codify “family values” and then actually enforcing them. The main problem I see with a new civil war is that it’s hard for a single administration to effectively anger and polarize a large enough segment of the population for an actual war to occur. The government would have to combine (heavily IMHO here) the worst aspects of conservatism (enforcement of “family values”, a Christian moral imperative) with the worst aspects of liberalism (gun control, big government, maybe high taxes). It’s hard to see how such a coalition could be formed, but if it was, I could see the country breaking into two sides, one being the “in power” government seated in DC, with its constituents in the south, mid east, and mid west. The map Sofa King linked to somewhat shows what I mean in the minimap. The north of the country, the west of the country, and the Northeast would fall into the opposition, with the seat of government probably in the west, perhaps California or Washington. I would expect that some of the republican states on that map, notably Idaho, Montana, and Nevada, might side with the opposition, simply due to objection to “meddling” by the government. Then again, I may be talking out of my ass:)
I could see the war starting when the governor of a state where the population was mostly against the administration’s policies refused to allow enforcement of them, raising constitutional objections. I see the gun control angle coming into effect if/when martial law is declared by the federal government to force state(s) to allow them to apply the laws of the new administration. After martial law was declared, the federal government would stop pretending to care about the constitution, saying that the country is in crisis and needs to be defended. Enter death spiral, Feds send troops to enforce laws, state uses troops stationed inside to to prevent access to federal troops, shots are fired, other like-minded states come to the aid of the state under attack, and then we have a civil war. One side claiming to be “fighting for freedom and the constitution”, the other side for “security and integrity of the country.”
I’d imagine that some states or regions might collapse into anarchy, due to wide variations in public opinion and fights over which side the state should be on.
Ok, there ends my wild-ass guessing about a possible, if unlikely, future. Count the number of times I used “I imagine”, “may”, “possibly”, “I expect”, and “might” to see just how far out of my arse I pulled this stuff:)