The University of California system has a history of infamy in regards to matters like this.
They fired a number of well-known scientists in the early 50s after those scientists refused to sign Oaths of Loyalty. The one I'm most familiar with, psychologist Edward Tolman of Berkley, was eventually reinstated without having to sign the oath.
Furthermore, psychologist James J. Gibson lost much of his military funding post-WWII on the grounds that he was a leftist radical. He was leftist, yes. But by no means a Communist or a spy or even a substantial sympathiser.
