We had an election and we decided that we wanted an egomaniac in charge. Being an egomaniac, he inferred that this was because, rather than despite of, his egomania. And he appears to be right about that, since the only people objecting are the same people who object to everything else he does.
If a significant fraction of them pushed back and said, "No, don't do that", he probably wouldn't. He reverses himself all the time when his people are displeased with him.
Americans pride themselves on being a nation of laws, not of men, so it's perhaps surprising that quite so many people are so wholeheartedly embracing rule by a cult of personality. But I've found that often, the thing a country most proudly declares about itself is the thing that it doesn't do, rather than what it actually does. Your actual accomplishments pale in comparison to your imagination.