South Korea's Supreme Court overturned on Thursday an earlier ruling that had cleared election frontrunner Lee Jae-myung of election law violation, throwing into doubt his eligibility to run for the presidency.

Prime Minister Han Duck-soo has been mulling whether to contest the election, while the main opposition candidate and front-runner suffered a setback in court.

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