A large number of people gathered near the White House on Saturday to protest President Trump’s agenda, building on a widespread effort by anti-Trump organizers to galvanize voters concerned with the administration’s policies and significant use of executive authority.

Attendees of the protest, which took place at Lafayette Square Park in Washington, D.C., told NBC News that the treatment of Kilmar Abrego Garcia, who the Trump administration says was mistakenly deported to El Salvador, was among the issues that led them to participate in the demonstration.

“Everyone should have due process. No one should be just taken away and locked up. I don’t care if he is a murderer, he still should get due process,” protester Susie Stern of Ohio said. “That’s what this country is based on. Laws.”

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