Before he took office, President Joe Biden vowed to be “the most pro-union president you’ve ever seen.”

Just hours after being sworn in, he fired Peter Robb, general counsel of the National Labor Relations Board, who previously worked for union-busting law firms and the Reagan administration during the Professional Air Traffic Controllers Organization (PATCO) strike. Biden subsequently issued executive orders guaranteeing collective bargaining rights and a $15-per-hour minimum wage for federal employees and government contract workers. And on Sunday, in his most surprising pro-union action yet, Biden released a video referencing the Amazon organizing drive in Alabama, warning employers not to retaliate against workers.

“There should be no intimidation, no coercion, no threats, no anti-union propaganda,” Biden said. “No supervisor should confront employees about their union preferences. You know, every worker should have a free and fair choice to join a union. The law guarantees that choice.”