Students gathered in New York City's Washington Square Tuesday to protest the arrest of Mahmoud Khalil, a pro-Palestinian activist at Columbia University who was detained by U.S. Immigration and Customs Enforcement agents this past weekend.

The White House complained that Columbia University is refusing to help federal agents find people being sought as part of the government’s effort to deport participants in pro-Palestinian demonstrati

Mahmoud Khalil's detention appears to be one of the first efforts by Trump to fulfill his promise to seek the deportation of some foreign students involved in the pro-Palestinian protest movement.