Unless we get a blow-out for either candidate that cannot be challenged, which does not seem likely based on the polls and battle lines, even if we have a Biden-esque victory for Harris, I’m fairly unsure of what will happen next. I personally doubt full on Civil War like in the Garland movie, or the actual civil war, but I would expect all kinds of shitty legal tricks, possible Supreme Court involvement and of course, stochastic and targeted violence, particularly towards immigrants and minorities. In other words, win or lose, I think the US may be in for a bad time. Hopefully I’m working in my assumptions here and it is somewhat more boring.
To better answer your question though, assuming things don’t completely fall apart: the two sides already don’t mix much, which is part of the problem in the first place. We’ll get more govt inaction due to gridlocked congress, probably more defense spending and some states, in the absence of federal legislating, will continue to take a larger role as they have been doing already in the recent era.
So basically more of the same, on a not-great trend line. Something has to give at some point, it’s hard to imagine how you could put the genie back in the bottle now, particularly with overall conditions in the world due to late-stage capitalism and climate change constricting each year.