Some how I don't think they care.It's not a matter of CAN
It's a matter of HOW MUCH, WHY, EGREGIOUS USE OF POWER, HARASSNENT, AND PROBABLE CAUSE.
When you are stopping university professors from entry because they expressed a negative view online, not a threat, just Trump Sucks, or just because they feel like it against someone who has crossed numerous times in the past, then yes, fuck them, I have better places to spend my tourist cash.
Make me unwelcome at the door, I won't come in.