When protests over the Israel-Hamas war took root on Columbia University’s campus last spring, Mahmoud Khalil became a familiar, outspoken figure in a student movement that soon spread to other U.S. c

Students marched from Washington Square Tuesday to protest the arrest of Mahmoud Khalil​, a pro-Palestinian activist at Columbia University. Some arrests were made at City Hall.

The arrest of a recent Columbia University graduate who led pro-Palestinian demonstrations on campus, and his quick transport to a Louisiana detention facility, drew a group of New Orleans students and demonstrators to rally Tuesday outside U.