But it's unclear if that policy would provide any protection against the type of speech that roiled the Auburn University campus Tuesday when white supremacist Richard Spencer spoke in a rented campus auditorium.

Spencer, who became known nationally for coining the term "alt-right" to describe his mix of racial and populist conservatism, spoke before a crowd of at least 430 in Auburn's Foy Hall, which included supporters, critics and reporters. Outside hundreds of counter-protesters demonstrated against him.