discriminating in employment due to one's affiliation is illegal in state and federal employment [1]. That does not mean one can break ToS and for example, publish on a massive public platform, your private opinion (which can be misconstrued as your employer's). Most employers have ToS against online activity during employment, for that reason.

It is also illegal to do the same for students. [2]

Faculty is already protected under tenure rules. And even for the nontenured, who really needs protecting ? Only 5.7% of all faculty are registered as conservative as of 2020 [3]

My point remains. "Filtering out" is illegal. Setting the stage on what is american, is not.

[1] https://www.legalmatch.com/law-library/article/political-aff...

[2] https://www.nysasa.org/index.php/news/6558-schools-cannot-en...

[3] https://www.thecollegefix.com/democratic-professors-outnumbe...