Lee Jae-myung and Kim Moon-soo represent the opposite sides of a country polarized over former President Yoon Suk Yeol’s use of martial law and his ouster.

South Korea's conservatives dropped their presidential candidate on Saturday and reopened the nomination process, as the former prime minister joined the party to challenge the liberal frontrunner in an election just four weeks away.

The candidates vying to lead South Korea kicked off their official campaigns Monday ahead of a snap presidential election to replace the country's impeached ex-leader, removed over a thwarted martial law bid.