I tend not to have much time for people like David Frum, but his piece "How Donald Trump Could Build an Autocracy in the U.S." in The Atlantic is worth reading. It is overly long, so here is the conclusion:
Those citizens who fantasize about defying tyranny from within fortified compounds have never understood how liberty is actually threatened in a modern bureaucratic state: not by diktat and violence, but by the slow, demoralizing process of corruption and deceit. And the way that liberty must be defended is not with amateur firearms, but with an unwearying insistence upon the honesty, integrity, and professionalism of American institutions and those who lead them. We are living through the most dangerous challenge to the free government of the United States that anyone alive has encountered. What happens next is up to you and me. Don’t be afraid. This moment of danger can also be your finest hour as a citizen and an American.