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

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 Republicans have found ways to convince Trump he’s helping the state rather than Newsom before, one expert said.

Judge Breyer sets hearing on California's lawsuit challenging Trump's federalization of National Guard amid escalating anti-ICE protests in Los Angeles

"This brazen abuse of power by a sitting president inflamed a combustible situation, putting our people, our officers and even our National Guard at risk. That's when the downward spiral began." Start the day smarter.

Protests surrounding immigration enforcement actions in the Los Angeles area and the Trump administration's response to them have cued up a public spat between President Trump and Gov. Newsom.

California Governor Gavin Newsom has been critical of President Donald Trump's move to take control of and deploy the National Guard.

Trump is “unhinged right now,” Gov. Gavin Newsom said, accusing the president of making the situation in LA worse by federalizing National Guard troops.