SAN FRANCISCO (AP) — A federal judge in San Francisco will consider evidence and hear arguments on whether the Trump administration violated federal law when it deployed National Guard soldiers and U.S. Marines to Los Angeles following protests over immigration raids this summer.

Gov. Gavin Newsom alleges the Trump administration broke a 19th Century law called the Posse Comitatus Act when it deployed military units to Los Angeles in June.

The trial will determine whether the Trump administration violated a 19th-century law by sending the National Guard to LA.