As Trump's second term deepens America's political divides, experts warn of a new wave of far-left militancy playing out online and, increasingly, in the streets.

At least one person was critically injured Saturday in a shooting at a protest against President Donald Trump in Salt Lake City. It came hours after two Democratic lawmakers in Minnesota were shot dead by a gunman.

Protests and the interactions between protesters and government authorities have a long history in the United States. From the Boston Tea Party to the Civil Rights movement, LBGTQ Stonewall uprising, the Tea Party movement and Black Lives Matter, public protest has been a crucial aspect of efforts to advance or protect the rights of citizens.

While the president contends that the L.A. protests against his immigration policy have been chaotic, the scenes are not as violent.

California National Guard troops arrived in Los Angeles on Sunday in a show of force following scattered clashes between immigration agents and protesters and amid a widening political divide between California and the Trump administration.

As Los Angeles prepares for another day of protests over immigration raids, experts weigh in on the criteria of a riot.

Mayhem undermines the vast majority of peaceful protesters in L.A. — and won’t do anything to stop Trump’s cruel and reckless immigration crackdowns.

Don’t think that somehow because they called out the National Guard there was violence. There was no violence. I was on the street, I know.”

The numbers have skyrocketed': protest organizers expect massive crowds nationwide on June 14, including up to 250,000 in Los Angeles.