Lewis and Millard's crusade to limit communist influence received an unexpected boost from the Soviet Union, in Nikita Khrushchev's 1956 denunciation of Stalinism. In his "Secret Speech", "On the Personality Cult and its Consequences", delivered to a closed session of the 20th Party Congress of the Communist Party of the Soviet Union, Khrushchev denounced Stalin for his cult of personality and his regime for "violation of Leninist norms of legality". When the excesses of Stalin's regime were exposed, it caused a split in the communist movement in Canada and permanently weakened it. By the end of 1956, the LPP's influence in the trade union movement and politics was spent.