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SEOUL, SOUTH KOREA - MAY 08: South Korean presidential candidate Moon Jae-in of the Democratic Party of Korea, cheer during a presidential election campaign on May 8, 2017 in Seoul, South Korea. (Photo by Chung Sung-Jun/Getty Images)

SEOUL, SOUTH KOREA - MAY 08:  South Korean presidential candidate Moon Jae-in of the Democratic Party of Korea, cheer during a presidential election campaign on May 8, 2017 in Seoul, South Korea.  (Photo by Chung Sung-Jun/Getty Images)