“It is a tearing of the fabric of the presidency that he’s not invited"

Trump’s conspicuous absences at both McCain’s and Barbara Bush’s funerals offer perhaps the starkest examples of the ways in which Trump finds himself ostracized from some of the duties other presidents performed as almost de facto aspects of their job.

“It is a tearing of the fabric of the presidency that he’s not invited, but I understand why he’s not invited because he’s personalized the presidency in a way no previous occupant of the presidency has done,” Naftali said. “Donald Trump has never accepted the fact that he is the head of state.”…

Yet Trump has also found himself excluded from — or opting out of — other, more routine parts of the presidency. During a trip to the United Kingdom in June, his visit with Queen Elizabeth II was undermined by reports in the British press that she was the only member of the royal family willing to meet with him. And two months earlier, the president notably did not receive an invitation to Prince Harry and Meghan Markle’s wedding, though the duo — who are reportedly no fans of Trump — eschewed nearly all political guests…

“We’ve kind of elected this apex predator, and you don’t sit T-Rex down at the dinner table,” said Alex Castellanos, a Republican media consultant and strategist. “I think civilized society doesn’t want him behaving crudely at the dinner table, and he has no interest in their pretensions.”