Columbia announced it had expelled, suspended and revoked the diplomas of a number of students who took part in a campus antiwar protest last spring. The protest saw students take over a school building and rename it “Hind’s Hall” in honor of Hind Rajab, a 6-year-old girl murdered by Israeli soldiers in Gaza.

Also on Thursday, the Trump administration issued a letter to Columbia demanding a list of “immediate next steps” in order to open discussions on restoring $400 million in government funding that was rescinded less than a week ago. The steps include banning face masks, ramping up its law enforcement authority and placing the Middle Eastern, South Asian and African Studies Department under “academic receivership,” or external oversight.