ICE arrested Mahmoud Khalil, a Palestinian graduate student, revoking his visa and green card for involvement in Columbia University's pro-Palestinian protests.

The move, which will mainly affect a single wastewater treatment plant, appeared intended to put pressure on Hamas.

Mahmoud Khalil, who recently completed a graduate program at Columbia, has legal permanent residency, his lawyer said.

The White House could face legal repercussions after it reportedly ordered the Department of Homeland Security to detain ...