David Frum in the Atlantic has a long-form piece describing a frighteningly plausible scenario of how Donald Trump can lead the U.S. into an autocracy. The TL;DR is that it won't be obvious that it's happening. It's a splendidly written piece, worth reading all the way through despite its length. I can't even find an excerpt that does it justice. Just set aside some time and read it. I don't assign homework that often.
Also, this cartoon came through on my feed today, noteworthy not just for its content but also for its (historical) context.