What is the irreversible damage that Trump can do to American democracy and the Constitution in … by Thomas Friedman

Answer by Thomas Friedman:

I think virtually everything that Trump does can be undone eventually by the next President. Even a Supreme Court nominee can be undone. There is something that he can do that would be irreversible: taking America out of the lead on climate change. If he does that the impact could be irreversible, so that's what I wrote my memo to him on. I pointed out that he had all of the coastal golf courses and they're ocean front now, but they could be ocean floor if he backs away from this, including his resort in Miami that's already experiencing flooding.

What is the irreversible damage that Trump can do to American democracy and the Constitution in 4 years?