I have noticed that the Blue Tribe and Red Tribe increasingly accuse each other of election fraud. They’re both probably right. Eventually, it will get to the point that the losing side in an election automatically assumes their opponents cheated, which will undermine the perceived legitimacy of the electoral process itself. If that happens, both sides could potentially move toward the endorsement of an outright dictatorship (a secular theocracy run by their respective sides, of course). Far be it from any of them to actually consider the prospect of peaceful separation.