That’s a good question, and I don’t get understand why it is tolerated. Are Republicans scared of being accused of censorship, or do they just not care that much? Maybe they like having a boogeyman to use for fundraising.
Part of it is that state politics are dominated by special interests, and there is no special interest behind fixing our universities.
Or, to put it bluntly, they don’t do anything about it because we don’t make them. We need an NRA for academic reform.