"Many Republican members of Congress have made a Faustian bargain with Donald Trump. They don’t particularly admire him as a man, they don’t trust him as an administrator, they don’t agree with him on major issues, but they respect the grip he has on their voters, they hope he’ll sign their legislation and they certainly don’t want to be seen siding with the inflamed progressives or the hyperventilating media...With most administrations you can agree sometimes and disagree other times. But this one is a danger to the party and the nation in its existential nature. And so sooner or later all will have to choose what side they are on, and live forever after with the choice."
-- David Brooks, The Republican Fausts, NY Times, Jan. 31, 2017
Faustian bargain, a pact whereby a person trades something of supreme moral or spiritual importance, such as personal values or the soul, for some worldly or material benefit, such as knowledge, power, or riches. The term refers to the legend of Faust (or Faustus, or Doctor Faustus), a character in German folklore and literature, who agrees to surrender his soul to an evil spirit (in some treatments, Mephistopheles, or Mephisto, a representative of Satan) after a certain period of time in exchange for otherwise unattainable knowledge and magical powers that give him access to all the world’s pleasures. A Faustian bargain is made with a power that the bargainer recognizes as evil or amoral. Faustian bargains are by their nature tragic or self-defeating for the person who makes them, because what is surrendered is ultimately far more valuable than what is obtained, whether or not the bargainer appreciates that fact.
-- Encyclopedia Brittanicca