What rights do green card holders have? Immigration experts answer questions around Mahmoud Khalil's case

The arrest of Mahmoud Khalil , a green card holder and former Columbia University student involved in pro-Palestinian campus protests in 2024, is raising questions about the rights of permanent residents in the United States. 

Immigration and Customs Enforcement agents arrested Khalil , a lawful U.S. resident married to an American citizen, in New York on March 8. He is currently being held in Louisiana. 

Khalil has not been charged with a crime. The Trump administration argues it can deport him on foreign policy grounds.