In what two ways did the soviets stray from the ideas about communism advanced by karl marx

Communism in the sense is the practice of Marxism, however, the twentieth-century communist leader did not think much like that.

The two ways soviet leaders were stray from the ideas about the communism advanced by Karl Marx are,

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necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.