In 1933, Litvinov was instrumental in winning a long-sought formal diplomatic recognition of the Soviet government by the United States. US President Franklin Roosevelt sent comedian Harpo Marx to the Soviet Union as a goodwill ambassador. Litvinov and Marx became friends and performed a routine on stage together.Block, Maxine ed. (1941) Current Biography. pp. 518–520. Litvinov also facilitated the acceptance of the Soviet Union into the League of Nations, where he represented his country from 1934 to 1938.
