President Donald Trump will sign an executive order on Thursday requiring U.S. colleges to certify that they protect free speech on their campuses or risk losing federal research funding, White House officials said.

Trump initially proposed the idea during a March 2 speech to conservative activists, highlighting the case of Hayden Williams, an activist who was punched in the face while recruiting for the group Turning Point USA at the University of California, Berkeley. At the time, Trump said that Williams “took a hard punch in the face for all of us.”

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