I am not aware of any college- even uber liberal ones- which did not have Trump voters and Trump supporters in the last election. I know there were Trump supporters among both students and faculty at Brown- allegedly the most liberal of the liberal institutions.
So again- Quant- I think you are conflating lots of different causes/effects/strands in your thinking. A student who wrote that he or she was an intolerant bigot, hated Muslims, felt that sexual assault was ok if you were famous, and ridiculed a military family grieving for a dead soldier would have difficulty getting admitted anywhere IMHO. It is just too easy to connect the dots these days if such a kid were prone to violence, and via a subpoena, the college had to reveal that yes- in the admissions essay, the student in question wrote about hating Muslims, committing sexual assault, ridiculing the disabled-- that would be very, very very bad for the college. And in retrospect- extremely stupid, and not part of a sophisticated university’s risk management protocol. But just writing about being part of a political campaign? Not risky. Writing about one’s conservative philosophy even at a liberal college? Not a problem. Just don’t start yelling that Mexicans are rapists and drug dealers and Adcom’s can deal with you.
I know very conservative faculty members at some very liberal institutions. They don’t feel marginalized- at least as they’ve described it to me. They write, they speak, they publish, they teach, they attend conferences in their disciplines- and they vote for the candidates they support, they give money to the campaigns they believe in- just like everyone else.