NBC News' Jacob Soboroff reports from Los Angeles City Hall where thousands of protesters have gathered for a 'No Kings' protest against the Trump administration and ahead of the president's Washington D.

At a glance … The final round of the US Open, the PGA Tour’s third major, gets underway this morning at Oakmont Country Club in Pennsylvania. Sam Burns has the overnight lead at 4-under. World No. 1 Scottie Scheffler is tied for 11th.

No Kings” organizers described the events as a “nationwide day of defiance” against President Donald Trump and authoritarianism.

The LAPD said on social media that the people in the crowd were throwing "rocks, bricks, bottles and other objects" while they were near the federal building.

In the Greater Boston area, thousands of “No Kings” marches and rallies are taking place, part of major demonstrations planned across the country.