Military-style vehicles and National Guards troops have blocked a portion of 4th Street in front of the Ronald Reagan Federal Building and Courthouse.

President Donald Trump has built his presidency around stretching the bounds of presidential authority, and his response to protests over an immigration crackdown in Los Angeles is no exception.

Monday's protests were largely calmer than Sunday's clashes. California officials insist that the 4,000 National Guards troops and 700 active duty Marines en route to L.A. are an unnecessary abuse of power by Trump.

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.

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

From Seattle and Austin to Chicago and Washington, D.C., marchers have chanted slogans, carried signs against ICE and snarled traffic through downtown avenues and outside federal offices.