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.

The demonstrations follow more than a week of large-scale protests in Los Angeles against Mr. Trump’s immigration crackdown and his decision to deploy the military there. Protesters gathered in Liberty Plaza outside of the Georgia State Capitol in Downtown Atlanta.