Denver police arrested 18 individuals during an "ICE Out!" immigration protest, with tensions over ICE policies sparking demonstrations and officials responding to potential conflict.

In Los Angeles, hundreds of protesters have now gathered by the federal building in downtown, where dozens of service members are standing guard with shields. Choruses of “Shame on you,” “Traitors” and “Marines out of LA” resound from the street.

Organizers of the “No Kings” demonstrations said millions had marched in hundreds of events. In Oregon, tens of thousands of people gathered in downtown Portland for two large protests -- one that began in Tom McCall Waterfront Park and the other at the Oregon Convention Center.

Millions of people turned out for "No Kings" protests nationwide on Saturday that were largely peaceful though there were some arrests and police had to disperse unruly crowds, including in Georgia and Los Angeles.

Tens of thousands of demonstrators marched along Fifth Avenue in New York City on Saturday for a "No Kings" protest.