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.
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.
If U.C. Berkeley does not allow free speech and practices violence on innocent people with a different point of view - NO FEDERAL FUNDS?— Donald J. Trump (@realDonaldTrump) February 2, 2017
Professional anarchists, thugs and paid protesters are proving the point of the millions of people who voted to MAKE AMERICA GREAT AGAIN!— Donald J. Trump (@realDonaldTrump) February 3, 2017
PHOTOS: Protests erupt at UC Berkeley ahead of Milo Yiannopoulos event