Pres Trump is great at flipping the script and using Dem/Left wing ideologies, policies and mandates against. He uses their playbook against them.
Tell universities/colleges that if they want money from Uncle Sam, that 50% of professors and admin have to be registered, bona fide Republicans.
That whole Affirmative Action thing the Left loves so much
That is a really good idea, and let me go a little further:
Most big schools in this country are Land Grant universities. The University of California is the biggest of them. Use the threat of taking back the land to end their rabid war on the citizenry. Make ROTC compulsory again. Restrict attendance to US nationals for at least 95% of the student body and similar for the faculty. No H1B professors or permanent graduate students using the schools as a Trojan horse to keep themselves here.
The screaming will be epic.