found online by Raymond
From Jonathan Bernstein:
The real reason for it is that Trump, from the very start, has refused to act as head of state, and so no one except for his supporters is willing to treat him as such. That was the story of the Boy Scout brouhaha. It’s related to his tweeting, too. Because Trump refuses to adhere to normal rules of decorum, no one can trust how he’ll behave in any situation.
Either he just doesn’t care about that part of the job, or he’s so inept (or so self-involved) that he’s unable to do it.
This goes back to the very beginning of his presidency.