Opposition candidate Lee Jae-myung cruised to victory in South Korea’s snap presidential election on Tuesday, ending an extended leadership vacuum that has stymied Seoul’s response to evolving North Korean military threats and the disruptive return of alliance-skeptic Donald Trump.

The country’s National Election Commission (NEC) officially announced Lee’s victory at 6:21 a.m. local time. Lee started his presidential term immediately after the announcement, taking over commander-in-chief duties from acting president Lee Ju-ho.

Lee declared victory in a speech to supporters outside the National Assembly after 1 a.m. on Wednesday with around 70% of votes. He made five promises, pledging to