Yes, as I recall Rush did not graduate with a BA degree and probably avoided many left wing professor.
I went to a couple such meeting as well. The Trotskyites were very active and recruiting students. There was one very attractive young woman who was a member of that group. I had a crush on her-if she had been interested in me who knows what would have happened.
I had several left of center professors but we had civilized debates and discussions. Two of them wrote me excellent letters of recommendation and one supported my participation in the Washington Semester Program at American University.
Wow, good experience too! But the country was different then...no more debating with profs for conservatives - should they ever want a recommendation!