"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.

Palestinian activist Mahmoud Khalil was in his university-owned apartment when ICE agents came into the residence and took him into custody, according to the New York Post. ICE agents also

Demonstrators plan to rally in New York City on Monday to demand the release of Mahmoud Khalil, a Palestinian activist and Columbia University graduate arrested by federal immigration agents — a detainment that President Donald Trump said was the "first arrest of many to come.