Richard Trumka, the head of the AFL-CIO union—one of the largest and most powerful—died at age 72, according to the union. His cause of death was not disclosed. “Rich Trumka devoted his life to working people, from his early days as president of the United Mine Workers of America to his unparalleled leadership as the voice of America’s labor movement,” AFL-CIO Communications Director Tim Schlittner said in a statement on Thursday. “He was a relentless champion of workers’ rights, workplace safety, worker-centered trade, democracy and so much more. He was also a devoted father, grandfather, husband, brother, coach, colleague, and friend.” A number of top Democrats addressed his death on Thursday, including President Joe Biden and House Speaker Nancy Pelosi (D-Calif.) “I rise today with some sad, some horrible, news about the passing of a great friend, Rich Trumka, who left us this morning,” Senate Majority Leader Chuck Schumer (D-N.Y.) …