20th Congress of the Communist Party of the Soviet Union, the meeting of the Communist Party of the Soviet Union held from February 14, 1956 to February 26, 1956.
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20th United States Congress, the national legislature of the United States of America from March 4, 1827 to March 3, 1829.
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He was reelected to the 18th, 19th and 20th United States Congresses and served from March 4, 1821, until his resignation in 1827 before the start of the 20th Congress.