An American leader of organized labor who served as president of a certain group from 1920 to 1960. A major player in the history of coal mining, he was the driving force behind the founding of the Congress of Industrial Organizations (CIO), which established the United Steel Workers of America and helped organize millions of other industrial workers in the 1930s. A leading liberal, he played a major role in helping Franklin D. Roosevelt win a landslide in 1936, but as an isolationist, broke with Roosevelt in 1940 on FDR's anti-Nazi foreign policy. He was a brutally effective aggressive fighter and strike leader who gained high wages for his membership while steamrolling over his opponents, including the United States government. He was one of the most controversial and innovative leaders in the history of labor, gaining credit for building the industrial unions of the CIO into a political and economic powerhouse to rival the AFL, yet was widely hated by calling for nationwide coal strikes which critics believed to be damaging to the American economy and war effort. Coal miners for 40 years hailed him as their leader, whom they credited with bringing high wages, pensions and medical benefits.