Who is John L. Lewis from Franklin D. Roosevelt and the New Deal, 1932-1940 and what is their importance?

John L. Lewis was a labor movement leader of the time. He had organized industrial workers into unions and couldn't gain charters or recognition from the American Federation of Labor. This led him, with various garment unions and coal miners, to form the Committee for Industrial Organization, which became the Congress of Industrial Organization several years later, when the AFL expelled the industrial unions.