In May 1941 Sorrell called for a strike against the Disney film studio.
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At age 12 he found employment in a sewer pipe factory in Oakland, California, and later in Oakland he worked with union leader Harry Bridges.
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According to author Peter Schweizer in his book Reagan's War: The Epic Story of His Forty-Year Struggle and Final Triumph Over Communism, archives released by the Russian government after the fall of the USSR show that Sorrell was a Soviet spy.
Walt Disney accused Pomerance, along with Herbert Sorrell and David Hilberman, of being a communist in an interview with chief investigator Robert E. Stripling before the House Un-American Activities Committee, although Disney said in the interview that "No one has any way of proving" this.
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The Carpenters found themselves in an unusual alliance with a coalition of other craft unions in Hollywood, the Conference of Studio Unions, led by Herbert Sorrell of the International Union of Painters and Allied Trades.