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Outgoing U.S. House Speaker Paul Ryan gives his farewell address at the Library of Congress on Capitol Hill in Washington Dec. 19, 2018. Ryan, 48, has served for almost two decades as a congressman representing Wisconsin State in the House of Representatives. His speakership will be succeeded on Jan. 3 by Nancy Pelosi, a Democratic congresswoman who is now House Minority Leader. (Xinhua/Ting Shen)