For historical examples I need to look no further than Europe in the 12th through 18th centuries for dangerous alliances between the church and governments as well as provisions for special interests which felled imperial powers over that time. My own rigidly Catholic Spain suffered a blow from which it has yet to recover.
This is a dangerous period for the current global power as divergences among its own electorate threaten to aggravate wounds which could escalate an already healthy level of mistrust. The rural and working classes pitted against an urban and professional class who increasingly lives in a different world. Trump somehow managed to sell the disenfranchised blue collar white males that he was going to bring them prosperity by cleaning up Washington which is a deception of the highest order.
Perhaps politics based on pragmatic governing is already a thing of the past as both sides become entrenched in their ideas. The GOP seems hell bent on selling a small government individualist approach that promotes a “trickle down economics” model that never existed while extoling its "Core Family Values" image to a rural class that votes against its own best interests. For them there will be no easy road to the American dream in this new global economy where the prize is more amassing personal wealth than about caring for your neighbor.
The establishment of the Democratic party sold out to special interests and a comfortable Wall Street which likes its status quo just the way it is which is why the youth vote abandoned Clinton. The millennials crave true progressives and they wanted a candidate that reflected their values. That could have been Bernie Sanders.
Therefore as long as this stalemate persists there will be no resolution to a situation that threatens an increasingly unsteady empire and, if we have learnt anything from history, its that empires crumble from within instead of from outside forces. Let's hope that doesn't happen.
Meanwhile President-elect Trump is already off to a roaring start by building a cabinet full of deplorables....