List of leaders of the Soviet Union
Following Joseph Stalin's consolidation of power in the 1920s, the post of the General Secretary of the Central Committee of the Communist Party became synonymous with leader of the Soviet Union, because the post controlled both the Communist Party and the Soviet Government, both indirectly, via Party membership, and via the tradition of a single person holding two highest posts: in the Party and in the government. The post of the General Secretary was abolished in 1952 under Stalin and later re-established by Nikita Khrushchev under the name of First Secretary. In 1966, Leonid Brezhnev reverted the office title to its former name. Being the head of the Communist Party of the Soviet Union (CPSU), the office of the General Secretary was the highest in the Soviet Union until 1990. The post of General Secretary lacked clear guidelines of succession, so after the death or removal of a Soviet leader the successor usually needed the support of the Politburo, the Central Committee, or another government or party apparatus to both take and stay in power. The President of the Soviet Union, an office created in March 1990, replaced the General Secretary as the highest Soviet political office.
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.