Newsom filed a lawsuit Monday in response to Trump ordering the deployment of roughly 4,000 National Guard members to Los Angeles following protests over his stepped-up enforcement of immigration laws. They were originally called in to protect federal buildings, and the president later ordered the deployment of 700 Marines.

Senior U.S. District Court Judge Charles R. Breyer said he was “trying to figure out where the lines are drawn.”

On Tuesday, the X page for U.S. Immigration and Customs Enforcement (ICE) posted photos of California National Guardsmen on the scene of a detention being carried out by an ICE agent with the caption "Photos from today's ICE Los Angeles immigration enforcement operation."

Army veteran and former Secretary of State Chuck Hagel talks about the potential risks about having military troops deployed in L.A.

"All of our soldiers are expected to keep up with evolving technology," said Captain Caleb Rogers, the head of the new unit.

About 500 of the National Guard troops deployed to the Los Angeles protests have been trained to accompany agents on immigration operations, the commander in charge said Wednesday.

Maj. Gen. Scott Sherman said 500 National Guard members have been trained to accompany agents on immigration operations.

The Justice Department claims California's request to limit the federal response to violent riots in Los Angeles would "countermand" the president's lawful military directives.