Red America would be a formidable challenger to Stalin and his heirs in the last half of the 20th century. Consider how relatively weak countries, like Yugoslavia and Albania, were able to break away from Moscow's dominance and mount an ideological challenge and the history of the relationship between the Soviet Union and China.

I have often thought that the very last thing the Soviet Politburo would have wanted was a Communist America, particularly one which had been created by local Communists not at the point of Soviet bayonets. It would have been very well placed to replace the Soviets as the dominant influence in global communism.

Perhaps Moscow would have had to take up capitalism to compete.