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American labor unions refrained from striking during World War II, but after the war, millions of organized workers engaged in strikes. Senator Robert A. Taft of Ohio and Representative Fred A. Hartley Jr. of New Jersey sponsored a labor-management relations bill (the Taft-Hartley bill) in 1947 to restrain union actions. These pro-union Californians petitioned their senators in opposition to the legislation.
Records of the U.S. Senate, National Archives and Records Administration