California Gov. Gavin Newsom questions Trump's mental and physical ability as their clash over immigration enforcement rages on.

It was earlier this year that California Gov. Gavin Newsom was making nice with President Donald Trump as he sought help for his wildfire-battered state and moderating his approach ahead of a potential bid for the White House.

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.

The California Governor has sued the U.S. President over the mobilization of the National Guard, calling it “an unmistakable step toward authoritarianism.”

Gavin Newsom's motion for a temporary restraining order that would limit the activities of 4,000 National Guard members and 700 Marines to protecting federal buildings in a small area of downtown where most of the protests have taken place.

Stephen Breyer's brother Charles Breyer will preside over the lawsuit Newsom brought against the Trump administration in California.