I definitely do get the feeling Liberal/Left Americans (inb4 "liberals arent leftists!!!," true but the particular issues I'm referencing are things liberals and leftists mostly agree on) and Conservative Americans have different, incompatible, moral systems where a compromise can't be reached.

I think it's possible but not probable. It's not like we're already seeing widespread squabbles or serious secession talk (ultimately I don't think the war would be fought on state lines but I do think secession talk would start happening before war breaks out.) Then again something like Trump getting put behind bars could change everything.