In 2015, Princeton University adopted the “University of Chicago principles” on free speech. Edward Yingling and Stuart Taylor Jr. have an article lamenting the way the university has been betraying those principles lately, and in an underhanded way. It has been punishing a professor for expressing his conservative views and then reinterpreting its rules to allow those actions.
For more, see this letter decrying the university’s behavior from the American Council of Trustees and Alumni.