[2][4] In 1926, he wrote for the "Spartacist Group" of Illinois in Young Comrade: Paper for Workers' and Farmers' Children.
[2] In February 1944, Weiss's fellow members of a sub-committee of the National Committee included: William Z.
Foster (chairman), Robert Minor (secretary), James W. Ford, Elizabeth Gurley Flynn, Israel Amter, Rose Wortis, Ray Hansbrough, Steve Nelson, Louis Todd, Sam Don, Alexander Trachtenberg, A. Landy, John Williamson, Mother Bloor (Ella Reeve Bloor), Anita Whitney, Charles Krumbein, Rob Hall, Pettis Perry, Alfred Wagenknecht, and V. J.
[6] In 1951, during HUAC hearings on Communist infiltration in Hollywood, "Max Weiss" received mention during discussion of Irving Henschel.
Roy M. Brewer, a IATSE leader, described Henschel as "lead of the Communist faction in 1944" and "member of the Rank and File Committee which attempted to set up a revolt in our organization during the 1945 strike in Hollywood."