He was arrested again a few months later, at the May Day protests in Washington, D.C., along with thousands of other people. Confronting a cop, he felt a baton against his throat, was tossed into a paddy wagon, and spent the night in jail. From his hotel room the next morning, he saw a chaotic scene—tear gas, anarchists clashing with police—that came to mind this past January, when he was protesting Donald Trump’s Inauguration. “It was like the seventies,” he said. “Nothing’s changed.”