The Trump administration’s use of an obscure portion of immigration law to detain and attempt to deport pro-Palestinian activist Mahmoud Khalil is likely unconstitutional, according to an order issued Wednesday by a federal judge in New Jersey.

This is the first judge to rule on the constitutionality of President Trump's pursuit of the deportation of any non-citizen deemed a peril to U.S. foreign policy.

The former Columbia student and pro-Palestinian activist remains in detention despite a federal judge’s partial ruling in his favor.