In a court filing Friday, the Trump administration said it won't release Columbia University pro-Palestinian activist Mahmoud Khalil.

The Trump administration is keeping Columbia University alumnus Mahmoud Khalil detained, despite a judge's Wednesday order for his release. Why it matters: The administration's tug-of-war with courts over Khalil,

Khalil has been detained since he was arrested in March. The government has argued that the secretary of state can “personally determine” whether he should remain in the country.