The leader of South Korea’s Democratic Party—the main opposition party in the country—was stabbed Tuesday while visiting the southern port city of Busan. Live-streamed television footage showed a man, wearing a paper crown with the politician’s name and apparently posing as a supporter, approach as Lee Jae-myung left through a group of reporters and others, the New York Times reports. The man asked for an autograph before stabbing Lee in the neck, the Guardian reports. Lee was seen on the ground, eyes closed, as people pressed a handkerchief to his bleeding neck before an ambulance took him to…