A high-stakes trial began Monday in a California courtroom over whether the Trump administration violated federal law when it deployed thousands of National Guard troops and United States Marines to Los Angeles following protests over immigration raids in June.

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.

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.

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

President Donald Trump has ordered 800 National Guard members to help law enforcement fight crime in Washington. The Army said Monday that only 100 to 200 soldiers will be on the city's streets at

A San Francisco federal judge will hold a landmark bench trial this week to determine whether the Trump administration violated a 19th-century law barring the use of military forces for domestic law enforcement when it sent United States Marines and California National Guard troops into Los Angeles to respond to immigration protests.