On Thursday, the president slammed UC Berkeley in a tweet for the protest and threatened to pull federal funding to the nation's top public university.
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VIDEO: Trump supporter pepper sprayed at Milo protest
There were three arrests during Wednesday's protest. Campus police say none were students. One person was arrested for blocking officers trying to break up the skirmish.
The two others are charged with assaulting two students from the Republican group that invited Milo Yiannopoulos, whose speech was canceled.
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PHOTOS: Protests erupt at UC Berkeley ahead of Milo Yiannopoulos event