The interim president of Columbia University, Katrina Armstrong, resigned on Friday just a week after the school capitulated to a number of demands by the Trump administration, which had threatened to pull $400 million in federal funding from the school. Columbia’s Board of Trustees then elevated its own board co-chair Claire Shipman to become the school’s new interim president.

On Saturday, a group of Columbia alumni ripped up their diplomas to protest the detention of Mahmoud Khalil and what they see as the school’s complicity with the Trump administration.