Throughout his career, he was viewed as a contradictory and enigmatic figure. Although he was a staunch Republican, Warner encouraged film projects that promoted the agenda of Democratic President Franklin D. Roosevelt's New Deal. He opposed European fascism and criticized Nazi Germany well before America's involvement in World War II. An opponent of communism, after the war Warner appeared as a friendly witness before the House Un-American Activities Committee, voluntarily naming screenwriters who had been fired as suspected communists or sympathizers. Despite his controversial public image, Warner remained a force in the motion picture industry until his retirement in the early 1970s.