A U.S. judge denied the Trump administration's attempt to dismiss the challenge to the arrest of Columbia University student Mahmoud Khalil, who was detained by immigration agents for participating in pro-Palestinian protests. The case has been moved to federal court in New Jersey. Khalil's lawyers argue that his arrest violated his First Amendment rights. The administration has cited a provision in the 1952 Immigration and Nationality Act to justify Khalil's deportation. Legal experts say this provision has only been tested once before.