Syngman Rhee
On July 20, 1948, Rhee was elected president of the Republic of Korea in the South Korean presidential election, 1948 with 92.3% of the vote; the second candidate, Kim Gu, received 6.7% of the vote. On August 15, the Republic of Korea was formally established in South Korea and Rhee was inaugurated as the first President of the Republic of Korea. The next month, on September 9, the north also proclaimed statehood as the Democratic People's Republic of Korea. Rhee himself had been an independence activist, and his relations with the "chinilpa" Korean elites who had collaborated with the Japanese were, in the words of the South Korean historian Kyung Moon Hwang, often "contentious," but in the end an understanding was reached in which, in exchange for their support, Rhee would not purge the elites. In particular, the Koreans who had served in the colonial-era National Police, whom the Americans had retained after August 1945, were promised by Rhee that their jobs would not be threatened by him. Upon independence in 1948, 53% of South Korean police officers were men who had served in the National Police during the Japanese occupation.
Ban Ki-moon
Until the outbreak of the 2016 South Korean political scandal, Ban was the leading potential candidate for President of South Korea in 2017. However, recent polls showed Moon Jae-in of the main opposition Minjoo Party of Korea in the lead with a support rating of 32.8 percent, while Ban trailed in distant second with 15.4 percent. Moon was eventually elected president on 10 May.
Although Ban repeatedly expressed his desires for running, a UN resolution in 1946 says "a Secretary-General should refrain from accepting" any Governmental position "at any rate immediately on retirement." Exceptions to the rule have been made in past history with the 1986 election of Kurt Waldheim to the post of President of Austria, although the position is ceremonial in nature.