Liberal groupthink is nothing new on college campuses, but resorting to violence and intimidation to stifle views contrary to the progressive orthodoxy is a dangerous escalation, according to a prominent scholar who was recently targeted by an angry mob of students and warns free speech is under fierce assault in the U.S.

Earlier this month, the Manhattan Institute’s Heather Mac Donald experienced the hostility first-hand while visiting the West Coast, first at UCLA and then at Claremont-McKenna College. Her visit to Claremont-McKenna was the most harrowing, with protesters blocking access to the auditorium where Mac Donald was to give her presentation. Organizers then tried to have her speak via video before the event was finally canceled over security concerns.

“The day before Claremont-McKenna, I had an effort to storm the stage. That was at UCLA. At Claremont-McKenna was a blockade around the building where I was supposed to speak to prevent anyone from entering to be able to listen to me in person and interact with me,” Mac Donald told WND and Radio America. “That’s certainly the most extreme that I’ve experienced.” READ MORE