In 1950, Robbins was called to testify before the House Committee on Un-American Activities (HUAC), suspected of Communist sympathies. Robbins, though willing to confess to past party membership, resisted naming names of others with similar political connections; he held out for three years until, according to two family members in whom he confided, he was threatened with public exposure of his homosexuality. Robbins named the names of persons he said were Communists, including actors Lloyd Gough and Elliot Sullivan, dance critic Edna Ocko, filmmaker Lionel Berman, playwright Jerome Chodorov, his brother Edward Chodorov, Madeline Lee Gilford and her husband Jack Gilford, who were blacklisted for their perceived political beliefs and had their careers suffer noticeably, to the point Gilford and his wife often had to borrow money from friends to make ends meet. Because he cooperated with HUAC, Robbins's career did not visibly suffer and he was not blacklisted.