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Rhee wanted his protégé, Lee Ki-poong, elected as Vice President—a separate office under Korean law at that time. When Lee, who was running against Chang Myon (the ambassador to the United States during the Korean War, a member from the opposition Democratic Party) won the vote with a wide margin, the opposition Democratic Party claimed the election was rigged. This triggered anger among segments of the Korean populace on 19 April. When police shot demonstrators in Masan, the student-led April Revolution forced Rhee to resign on 26 April.