"This is the first arrest of many to come," the president said of Mahmoud Khalil, a green card holder abducted by immigration agents and sent to Louisiana.
A Columbia University graduate detained by Immigration and Customs Enforcement (ICE) is now at the center of a political firestorm as the Trump administration slashes federal funding to the school and enforces new visa restrictions
Khalil, a Palestinian activist who was involved in Columbia University's protests last year, has been detained by ICE.