The protest remained overwhelmingly peaceful, with music filling the air as people marched and danced down Dolores and Market streets.

Hundreds of people gathered at Ocean Beach in San Francisco on Saturday morning to protest the Trump administration by forming a massive human banner.

Nationwide protests begin early in San Francisco with demonstration outside building where immigrants were told to report

Motorists in two cities across the nation have struck “No Kings” protesters, according to multiple reports. Police detained two motorists whom they say intentionally drove into crowds of protesters in San Francisco, California and Culpeper, Virginia. There is no reason to believe the two incidents are connected.

Peter Hosey is the organizer of the San Francisco "No Kings" protest. He's gathering people to the grass at Mission Dolores Park on Saturday. "We want to give people a chance to show up in the streets, in mass and great numbers, and take our message to the people," he said.

Alphabet-owned robotaxi company Waymo is limiting service due to Saturday’s scheduled nationwide “No Kings” protests against President Donald Trump and his policies.

Political organizing group Move On, who was a partner in the "No Kings" rallies, echoed the 5 million person estimate in a fundraising email.Start the day smarter. Get all the news you need in your inbox each morning.