Secretariat of the Communist Party of the Soviet Union the CPSU, who was also a Politburo member, was the leader of the Secretariat and of the Party. Dual membership in the Secretariat and the Politburo was in practice reserved for two or three very senior members of the Soviet leadership, and in the post-Stalin era (after March 1953) was a stepping-stone to ultimate power. The last five Soviet leaders (Nikita Khrushchev, Leonid Brezhnev, Yuri Andropov, Konstantin Chernenko and Mikhail Gorbachev) were all senior Secretaries before becoming First or General Secretaries. Additionally, Georgy Malenkov was briefly reckoned as the leader of the Party for a week after Stalin's death by
Censorship of images in the Soviet Union was also among the first members of the Politburo. He became an enemy of the State and was erased from Soviet history after leading the failed struggle of the Left Opposition against the policies and rise of Joseph Stalin in the 1920s and the increasing bureaucratization of the Soviet Union. Trotsky was expelled from the Communist Party and deported from the Soviet Union in the Great Purge. As the head of the Fourth International, he continued in exile to oppose the Stalinist bureaucracy in the Soviet Union, and was eventually assassinated in Mexico by Ramón Mercader, a Soviet agent who