Columbia University student Mohsen Mahdawi, who co-founded a pro-Palestinian campus organization with Mahmoud Khalil, was ...

Mohsen Mahdawi, left, and Mahmoud Khalil participate in a pro-Palestinian protest at Columbia University, Thursday, Oct. 12, 2023, in New York. (AP Photo/Yuki Iwamura) Mahmoud Khalil, second from left ...

A Palestinian man who led protests against the war in Gaza as a student at Columbia University was arrested Monday at a Vermont immigration office.