The Trump administration has told Columbia University that it must make a series of policy changes as a precondition for talks on restoring $400 million in canceled federal contracts and grants, ratcheting up its crackdown on the school and others where pro-Palestinian protests flourished last year.

Columbia University student has been arrested by federal Immigration and Customs Enforcement agents with Homeland Security Investigations in connection with President Trump’s crackdown, while another had her student visa revoked and self-deported,

Federal agents arrested Mahmoud Khalil, a Palestinian student who played a major role in last year's protests at Columbia University, students said.