Rest of the attendees includes many other Trump supporters, who have all right to be there and shouldn't have to fear getting kicked out for admitting it. You seem to imply that Trump supporters either don't exist or don't matter - whether or not people of some political party affiliation have the same rights as everyone else is just as much part of professional ethics as the equivalent thing for gender or race. This political filtering seems a bit like a repeat of McCarthy's Red Scare.