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

Congressional Republicans on Monday were quick to endorse President Donald Trump’s deployment of the National Guard to quell violent Los Angeles protests against the administration’s crackdown on illegal immigration.

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