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.

President Trump has fired the lone Democrat on the National Labor Relations Board, leaving the country’s top arbiter of union issues without

The removal of the National Labor Relations Board’s general counsel had been expected. But the firing of a Democratic member stops it from protecting workers’ rights, for now.