 Complete the following phrase:  In 1924, Kaganovich became a full member of the Central Committee, after having first been elected as a candidate one year earlier. From 1925 to 1928, Kaganovich was the First Secretary of the Communist Party of the Ukrainian SSR. He was given the task of ukrainizatsiya  meaning at that time the building up of Ukrainian communist popular cadres. He also had the duty of implementing collectivization and the policy of economic suppression of the kulaks wealthier peasants. He opposed the more moderate policy of Nikolai Bukharin, who argued in favor of the peaceful integration of kulaks into socialism. In 1928, due to numerous protests against Kaganovichs management, Stalin was forced to transfer Kaganovich from Ukraine to Moscow, where he returned to his position as a Secretary of the Central Committee of the Communist Party, a job he held until 1939. As Secretary, he endorsed Stalins struggle against the so-called Left and Right Oppositions within the Communist Party, in the hope that Stalin would become the sole leader of the country. In 1933 and 1934, he served as the Chairman of the Commission for Vetting of the Party Membership Tsentralnaya komissiya po proverke partiynykh ryadov and ensured personally that nobody associated with anti-Stalin opposition would be permitted to remain a Communist Party member. In 1934, at the 