Nobel Prize-winning economist Joseph Stiglitz, one of Columbia University’s most renowned professors, denounced the institution where he has taught for more than two decades over its recent capitulations to the Trump administration.

After Donald Trump withdrew some $400 million in federal funding from the university and issued a list of demands, Columbia entered negotiations that concluded with the school caving to pressure from the White House. Among other concessions, the school made concessions about faculty appointments and placing the Middle East studies department under review.

Stiglitz reserved his harshest rhetoric for the attempts to deport current and recent Columbia students, including the arrests of Mahmoud Khalil on March 8 and Mohsen Mahdawi earlier Monday in Vermont. “What is clear is that it appears that there’s a pattern of intimidation,” he said, “a pattern where they’re trying to discourage people to protest, and a pattern that they’re particularly going after Palestinians.”