The arrest of a Palestinian activist who helped organize campus protests of the war in Gaza has sparked questions about whether foreign students and green card holders are protected against being deported from the U.

When attorneys for Mahmoud Khalil enter a courthouse on Wednesday, they will have one mission in mind: to get their client, a Palestinian activist, released.

Immigration and Customs Enforcement agents told Mahmoud Khalil that his student visa had been revoked before his arrest.