Facing a complex set of thorny challenges at home and abroad, Lee Jae-myung says he will deal with them with “pragmatism.”

South Koreans are going to the polls to elect a new president, but what happens once the decision is made? Here's what you need to know.

The new president, who will take office immediately, faces a number of pressing challenges including repairing domestic divisions, navigating US trade tensions and confronting North Korea’s growing nuclear threat.