D-A had veered within the extreme orbit of the old Chicago CPUSA apparatus, indeed, the Amer-Comnst-Prty was founded in Chicago in Sept-1919.
Of the 2, David Canter had the deep Party and even Soviet roots.
D-C's father Harry left Russia in the 1880s. H-C hooked up with every progressive and Comunist cause under the sun, from the Scottsboro Boys to Sacco-Vanzetti.
In May 1929 he was convicted for radical activities and served a year in jail. Active in the Industrial Workers of the World, Harry became secretary of the Boston Communist Party.
In 1930, he ran for governor of MA on the Comunist Party ticket. Harry's devotion was such that in 1932 he earned a special invitation to Stalin's USSR, which he enthusiasticly