Organizers said the event at a sports arena on the University of Miami campus was livestreamed to locations in all 50 states. ACLU Executive Director Anthony Romero said 200,000 people had signed up to attend one of an estimated 2,000 local events.

The event, staged in town hall style, was aimed at capitalizing on numerous demonstrations since Trump's election in November and to make sure people know their rights to protest, Romero said. He said priority issues are immigration, the First Amendment free speech and religious freedom rights, civil and reproductive rights and rights of gay, lesbian and transgender people.

"We will bring all the lawsuits necessary to defend these rights," Romero said. "We'll do the work in the courts. You do the work in the streets. People are motivated. They want to be engaged."