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.

A federal judge will hold a three-day trial to determine whether Trump's deployment of troops in California violated the 1878 Posse Comitatus Act.