The group, which was generally composed of non-Communist New Deal liberal Democrats, was hurt when it was subsequently revealed that Sterling Hayden had been a Communist Party member. Humphrey Bogart, who had been assured that the Committee membership had been vetted, and there were no Communists among its membership, was incensed by the revelation that Hayden was a Communist. There was a great deal of naïveté among Committee members such as Bogart, who did not know that Hollywood 10 members such as Alvah Bessie, John Howard Lawson, and Dalton Trumbo were known to be Communist Party members. Lauren Bacall later said that she, Bogart, and other Committee members had been duped by the Communists. "We didn't realize until much later that we were being used to some degree by the Unfriendly 10", she said.