Sounds like balkanization is in our future.
I mean, we sorta already are culturally. I decided a few years ago to limit my exposure to maga types, and don't get into any political "discussions" with the ones I can't avoid. And by "discussion" I mean "play the part of a duck in a shooting gallery", because all they ever want to do is rant and score on a supposed bleeding heart lib. Working from home, and working for a company that doesn't put up with political badgering, helps.
I can't see how any actual civil war/splitting up could ever happen considering how interwoven businesses, and families, are across states. It would cost them gazillions of dollars to actually make it happen, so they won't push for it. Occasionally Texas will whine about how they are splitting off, go ahead and do it if you want. Sure I'd have to move north if the Confederacy formed again, but I'm planning on that anyway.