Lee Jae-myung has been the front-runner in South Korea's presidential election, but his candidacy has been complicated by criminal trials he has decried as politically motivated.

South Korea's former President Yoon Suk Yeol is to be additionally charged with abuse of authority. The ex-president is already being tried for insurrection, over his failed bid to impose martial law.

South Korea’s former Prime Minister Han Duck-soo says he will run in next month’s presidential election and would seek to lessen the powers of the office and ease strife-ridden domestic politics if he