Lee faces the most daunting set of challenges for a South Korean leader in nearly three decades, ranging from healing a country scarred by the martial law attempt to tackling unpredictable U.S. protectionist moves.

South Korea's voters cast their ballots in a snap presidential election sparked by the impeachment of Yoon Suk Yeol.

The new president will be tasked with pulling the nation out of political turmoil and face a polarized country and world.