I believe that would be Vladmir Lenin
Supreme Court nominations
Nixon needed China in negotiations with Vietnam.
-China is the most populated nation in world and wanted to have commercial relations
-Play USSR and China off one another
-Nixon would not be accused of being "soft on communism"
Soviet Union had stretched from Europe to the Pacific Ocean and conquering all of it would take time and effort, and the Nazis had to face the Soviets and nature at the same time.