FILE - In this Thursday, April 27, 2017 file photo, demonstrators shout slogans directed at city hall during a rally for free speech near the University of California, Berkeley campus in Berkeley, Calif. Ann Coulter's speech that day was cancelled amid threats of violence, the latest example of a speaker with controversial views being blocked from talking. Since the beginning of 2016, more than two dozen campus speeches have been derailed amid controversy, according to the Foundation For Individual Rights In Education, a group that monitors free speech on campuses. (AP Photo/Marcio Jose Sanchez, File)

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