During Vladimir Lenin's leadership of the Communist Party, the Central Committee functioned as the highest party authority between Congresses. However, the 8th Party Congress (held in 1919) established the Political Bureau (Politburo) to respond to questions needing immediate responses. Some delegates objected to the establishment of the Politburo, and in response, the Politburo became responsible to the Central Committee, and Central Committee members could participate in Politburo sessions with a consultative voice, but could not vote unless they were members. Following Lenin's death in January 1924, Joseph Stalin gradually increased his power in the Communist Party through the office of General Secretary of the Central Committee, the leading Secretary of the Secretariat. With Stalin's takeover, the role of the Central Committee was eclipsed by the Politburo, which consisted of a small clique of loyal Stalinists.