After Impeachment, South Korea Is Left With No Elected Leader

President Yoon Suk Yeol’s impeachment and suspension from office has left South Korea, one of the United States’ most important allies, without a strong​ elected leader to tackle challenges like a belligerent North Korea and a deepening political polarization at home.​By voting to impeach Mr.Yoon on Saturday, the National Assembly delivered a crushing vote of no confidence in a leader who had been unpopular through his term.

​Outside the legislature, people danced in the streets, celebrating Mr.Yoon’s peaceful removal from office less than two weeks after his declaration of martial law as proof of the resilience of the country’s democracy.Yet, despite their euphoria, the political turmoil and uncertainty unleashed by Mr.

Yoon’s botched attempt on Dec.3 to place his country under military rule for the first time in 45 years remained unresolved.His impeachment has created a political vacuum at the top.

Prime Minister Han Duck-soo, the No.2 official in the government hierarchy, has stepped in as the interim leader, but he has no electoral mandate.

A new government cannot be born until the Constitutional Court decides whether to reinstate or formally oust Mr.Yoon.The court’s deliberations could take up to six months.

When the court deliberated on the impeachment of President Park Geun-hye in 2016, it needed three months to reach its conclusion and remove her.This time, the nine-member court has the additional problem of having three vacancies to fill.

In the coming days, the National Assembly is expected to name three justices, asking Mr.Han to formally appoint them.

Only two of the existing six justices were appointed by Mr.Yoon’s progressive predecessor, Moon Jae-in.If Mr.

Yoon is formally removed, South Korea will need another two months to elect a new president....