SEOUL — South Koreans will head to the polls Tuesday to vote for a new president two years early, following the impeachment and removal of Yoon Suk Yeol for declaring martial law for the first time in the nation’s democratic history.

In typical South Korean style, campaign rallies have felt like K-pop performances, complete with choreographed dance moves and boppy tunes. But the serious issues of martial law, impeachment and democratic norms all loom large as voters cast their ballots.