 In 1944, dissident IPR member Alfred Kohlberg submitted to IPR Secretary General Edward C. Carter an 88-page analysis alleging that the institute had been infiltrated by pro-Communist elements.Among other things, Kohlberg alleged that Field was a member of the National Committee of the Communist Party.In 1945, former Soviet spy Elizabeth Bentley told FBI investigators that she had attended a conference in Field's home earlier that year.