The Trump administration has delivered an extraordinary ultimatum to Columbia University, threatening to permanently end federal funding to the school unless it cedes control of an international studies department and implements sweeping changes to other policies.

The Trump administration has sent a letter to Columbia University’s interim president and board of trustees that includes a list of demands the school must meet if it wants the administration to reverse its cancellation of $400 million in federal funds Columbia was authorized to receive.

Leqaa Kordia, a Palestinian from the West Bank, was arrested by immigration officers for overstaying her student visa, the Department of Homeland Security said.

Columbia University announced punishments, including expulsions and suspensions, for students who occupied Hamilton Hall in a pro-Palestinian protest last year.