Opposition leader Lee Jae-myung was sworn in as South Korea’s next president on Wednesday following a dramatic snap election six months after the country’s previous leader declared martial law and plunged the nation into chaos.

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.

South Korea’s ruling People Power Party floor leader Kweon Seong-dong sits during the impeachment vote of a plenary session for South Korean acting President and Prime Minister Han Duck-soo at the National Assembly in Seoul,