Trump credited the military for stopping Los Angeles from turning into a “crime scene” Thursday, while Newsom has said the troops’ presence inflamed protests.

The legal showdown between California Gov. Gavin Newsom and President Donald Trump takes center stage Thursday afternoon in a federal courtroom in San Francisco.

California Gov. Gavin Newsom (D) has argued that the deployment is “an illegal act, an immoral act, an unconstitutional act.”

Authorities swept in with flash-bangs and tear gas grenades to disperse hundreds of protesters in Los Angeles.

The National Guard has at times detained protesters in its deployment to Los Angeles, an official said Wednesday, as demonstrations against Immigration and Customs enforcement raids spread to other major cities.

The Justice Department called California Gov. Gavin Newsom’s (D) attempt for a judge to limit President Trump’s National Guard deployment in Los Angeles a “crass political stunt endangering

"Neither the National Guard nor the Marines are engaged in law enforcement," the DOJ's motion reads. "Rather, they are protecting law enforcement."

Gov. Gavin Newsom asked the Trump administration on Sunday to rescind its move to deploy 2,000 California National Guardsmen to Los Angeles to subdue immigration protests, accusing the White House of illegally overriding his authority and intentionally inflaming tensions with protesters.

President Donald Trump has authorized the deployment of an additional 2,000 National Guard members to help respond to protests in Los Angeles over immigration raids.

Trump border czar Tom Homan announces National Guard deployment to Los Angeles County after anti-ICE demonstrations turned violent, stating authorities won't apologize for enforcing the law.