By Brad Brooks, Phil Stewart, Idrees Ali and Dietrich Knauth LOS ANGELES (Reuters) -Hundreds of U.S. Marines arrived in the Los Angeles area on Tuesday under orders from President Donald Trump, as the city's mayor declared a curfew for parts of the downtown area and police arrested 197 people in a fifth day of street protests.

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

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.

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.