Los Angeles police swiftly enforced a downtown curfew Tuesday night, making arrests moments after it took effect, while deploying officers on horseback and using crowd control projectiles to break up a group of hundreds demonstrating against President Donald Trump’s immigration crackdown.

President Donald Trump has deployed 4,000 National Guardsmen and 700 Marines to LA. But California Gov. Gavin Newsom and California Attorney General Rob Bonta are suing the Trump administration, saying they unlawfully "trampled over" California’s sovereignty when they federalized the California National Guard.

Unlike the 1992 riots, protests have mainly been peaceful and been confined to a roughly five-block stretch of downtown LA, a tiny patch in the sprawling city of nearly 4 million people. No one has died. There’s been vandalism and some cars set on fire but no homes or buildings have burned.

Massachusetts senators Elizabeth Warren and Ed Markey called Trump's move to deploy the National Guard to quell LA protests "authoritarian."

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

4:47 p.m. EDT The Trump administration asked the judge to reject Newsom’s request and allow it to respond by Wednesday, calling Newsom’s attempt to block the deployment of federal troops “legally meritless” and saying it would jeopardize the safety of Homeland Security personnel and interfere with the government’s ability to carry out operations.

National Guard troops with riot shields pushed protesters into the streets, as tear gas was deployed and less-than-lethal rounds exploded in the roadway.

President Donald Trump is moving swiftly to act on his immigration promises with little internal restraint, determined to test the bounds of his executive authority in order to fulfill the promises of his reelection campaign.