Hundreds of demonstrators marched downtown while a spokeswoman for President Trump said the president had the authority to detain Mahmoud Khalil.

The Trump administration said it is using intelligence collected by the Department of Homeland Security to identify international students who participated in protests against the Israel-Hamas war across dozens of college campuses last year,

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 demonstrations.