President Donald Trump has removed a Democratic member of the U.S. National Labor Relations Board from office, an unprecedented move that will escalate an ongoing legal battle over the scope of the president's powers to control federal agencies.

Democrat Gwynne Wilcox, whose term was supposed to run through August 2028, said her unprecedented firing violates Supreme Court precedent.

Jennifer Abruzzo was removed as general counsel of the National Labor Relations Board. She was widely seen as having taken an aggressive approach in enforcing workers’ rights.