General Secretary of the Communist Party of the Soviet Union
In the 1950s, Stalin increasingly withdrew from Secretariat business, leaving the supervision of the body to Georgy Malenkov, possibly to test him as a potential successor. In October 1952, at the 19th Party Congress, Stalin restructured the party's leadership. His request, voiced through Malenkov, to be relieved of his duties in the party secretariat due to his age, was rejected by the party congress, as delegates were unsure about Stalin's intentions. In the end, the congress formally abolished Stalin's office of General Secretary, though Stalin remained one of the party secretaries and maintained ultimate control of the Party. When Stalin died on 5 March 1953, Malenkov was the most important member of the Secretariat, which also included Nikita Khrushchev, among others. Under a short-lived troika of Malenkov, Beria, and Molotov, Malenkov became Chairman of the Council of Ministers but was forced to resign from the Secretariat nine days later on 14 March, leaving Khrushchev in effective control of the body. Khrushchev was elected to the new office of First Secretary at the Central Committee plenum on 14 September of the same year. Originally conceived as a collective leadership, Khrushchev removed his rivals from power in both 1955 and (especially) 1957 and reinforced the supremacy of the First Secretary.
Dinmukhamed Kunaev
Kunaev was deputy chairman of the Council of Ministers of the Kazakh SSR from 1942 to 1952. In 1947, 1951, 1955 and 1959 he also was a deputy in the Kazakh SSR Supreme Soviet. Kunaev's rise in Communist Party ranks had been closely tied to that of Leonid Brezhnev's. Khrushchev appointed Panteleymon Ponomarenko as the first secretary of the Communist Party of Kazakhstan, and Leonid Brezhnev as the second secretary, in February 1954. Soon, Kunaev and Brezhnev developed a close friendship which lasted until the death of Brezhnev. Brezhnev became the first secretary of the Communist Party of Kazakhstan in 1955 and a member of CPSU Politburo in 1956. When Brezhnev left Kazakhstan in 1956, I. Iakovlev became the First Secretary of the Kazakh Communist Party. Kunaev had to wait until 1960 to attain the post.