Protesters at the Claremont Colleges successfully prevented conservative commentator Heather Mac Donald from speaking on their campus. Students at the Claremont Colleges, a consortium of undergraduate and graduate liberal arts colleges in Claremont, California, blocked entrances to the building that Mac Donald was scheduled to speak in. Mac Donald, a senior fellow at the Manhattan Institute, a conservative think tank, was giving a speech titled “The War on Police,” a reference to her 2016 book about how political rhetoric against police makes America less safe. Mac Donald was forced to livestream her speech after protesters blocked students and professors from...