Trump announced plans on Monday to send 800 National Guard troops to Washington D.C., as his California guard deployment is on trial.

A federal judge in San Francisco will hear arguments on whether military troops deployed this summer by the Trump administration to Los Angeles violated a federal law that bars troops from conducting law enforcement duties within the country.

A deputy commanding general testified Monday that military forces called in to assist with immigration raids in Los Angeles were allowed to take some law enforcement actions despite a federal law that prohibits the president from using the military as a domestic police force.