A federal appeals court on Tuesday spent more than an hour grappling with whether President Donald Trump unlawfully federalized thousands of members of California’s National Guard to beef up security in Los Angeles amid unrest over immigration enforcement there.

In the high-stakes legal showdown between California Gov. Gavin Newsom and President Donald Trump over Trump’s deployment of the National Guard in Los Angeles, a U.S. government lawyer argued Tuesday that judges have no power to stop a president from deploying such troops.

A federal appeals court panel Tuesday sharply questioned Gov. Gavin Newsom‘s (D-CA) lawsuit aimed at barring President Donald Trump from federalizing the California National Guard and deploying it to Los Angeles.