Good framing. It's hard to imagine anything that would do it. Definitely not any level of violence or cruelty to outsiders, but also seemingly no level of violence to insiders either. It's possible they would react to a direct, personalized threat.
Kevin M. KruseHere's a thought experiment: How much further out there would Trump have to go for the attendees at the White House Stenographers' Association dinner to object? Is there *anything* more he could plausibly do or say that would cross a line for them? I can't think of anything.