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.

After a tighter-than-expected presidential election, Lee Jae-myung aims to restore stability to a nation wracked by months of political upheaval. But issues of trust remain.

South Korean President Lee Jae-myung and U.S. President Donald Trump held their first official phone call the night of June 6, just two days after Lee’s election win was confirmed. According to presidential spokesperson Kang Yoo-jung,