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.

Appellate court disagreed that the Trump administration’s mobilization of the National Guard was beyond it’s review, but upheld its ability to do so for now.

The decision blocks a lower-court order that found the president exceeded his authority by federalizing state forces in response to protests.