SEOUL, South Korea (AP) — A man who stabbed South Korea’s opposition leader in the neck earlier this year was sentenced to 15 years in prison on Friday, court officials said.

The knife-wielding man attacked Lee Jae-myung, head of the liberal Democratic Party, South Korea’s biggest political party, in January after approaching him asking for his autograph at an event in the southeastern city of Busan. After being detained by police, he told investigators that he wanted to kill Lee to prevent him from becoming South Korea’s president.