A federal court petition demanding Mahmoud Khalil’s release provides details of the Columbia University activist’s arrest. Trump says more arrests are to come.

The arrest of a Palestinian graduate student who represented anti-Israel protests at Columbia University marks a significant shift for the U.S. government, even from an administration that has prioritized cracking down on both immigration and campus anti-war protests.

U.S. immigration agents arrested a Palestinian graduate student who has played a prominent role in pro-Palestinian protests at New York's Columbia University as part of U.S. President Donald Trump's promised crackdown on some anti-Israel activists.