“In my beginning”, wrote TS Eliot in Four Quartets, “is my end.” This, at least, can be said of Donald Trump: he will leave the White House as he entered it, strangely unaltered by four years as president.

His hairstyle has been toned down. His demeanour – malign, self-obsessed, reckless of truth and decency, revelling in the harm he has done and can still do to the norms and institutions of democracy – has not.

This continuity is ominous. Trump was able to upend American politics before he was in office. There is every reason to think he will still be able to do so after he is replaced by Joe Biden on January 20th.