There already has been. Trumpism from the mainstream (although that’s not why he was elected, his faux populism is why he is prez) and the Alt-Right on the margins. The comments thread for this is interesting. Whenever I mention the idea of peaceful separation, the response I usually get from “both sides” is “But THEY will never leave us alone!” which is probably true in the sense that “both sides” seem to want to dominate every aspect of social, political, and cultural life.