Whilst there’s obviously more pro Trump areas in parts of the country, it’s obviously more complex than the slavery issue in the 1860’s, which you could pinpoint views based exactly on state lines.
Unless all the Pro Trump supporters head south into a specific couple of big states and the normal people move out of there.
On that occasion it was the southern states wanting to break away from the Union. If and when it happens, I believe it would be the wealthier, coastal states (and those that abut them) that will eventually have had enough and want to call it a day. Could see it splitting in a much more complex geographical pattern than 160 or so years ago.
It will inevitably involve a degree of migration, like in the Indian sub-continent in the 1940’s, but not as pronounced, although probably just as bitter.
I think the second amendment will be a factor too, as well as the electoral college if it delivers government over a sustained period against the wishes of the majority, and the voters of those coastal states and their neighbours.
Don’t think it will happen anytime soon, and I agree it’s nowhere near as binary as it was in the mid-19th century (tbf the world is hugely more complex now than it was then) but I think the divisions in the country are too great for a fracture to be less than likely to occur.
I've said this before btw, and some folk dismissed the notion out of hand, but global events in the last four years make predicting such a thing with any great certainty, foolish imo.
And maybe it was inevitable. Maybe the end of the civil war put a sticking plaster (albeit a long lasting one) over a profound dichotomy of social philosophy between regions in the US that greater technology and means of communication would eventually expose and cause those divisions In American society to recrudesce to an extent that made them, once again, manifest themselves dramatically and profoundly. There certainly seems enough hate and anger atm, for that to be, at the very least, a realistic prospect, surely.
And maybe social media is the catalyst, not the cause.