South Korea’s top court has cast doubt on frontrunner Lee Jae-myung’s eligibility to run in next month’s snap presidential election, while the resignations of the prime minister and finance minister shook the interim government in place since December’s martial law.

Education Minister Lee Ju-ho took over as acting president, the third since the martial law decree, in advance of the June 3 snap election. The vote was called after the Constitutional Court removed former President Yoon Suk Yeol from office over his brief martial law attempt.

That race was rocked by a Supreme Court ruling that could threaten the candidacy of former opposition party leader Lee Jae-myung, who has dominated opinion polls.

The Supreme Court overturned an earlier ruling that had cleared Lee, saying he had violated election law by publicly making “false statements” during his 2022 presidential bid. It sent the case back to the appeals court and ordered it to issue a sentence, which could bar Lee from running for office for up to five years.

South Korea has been led by a rotating cast of acting presidents since Yoon was impeached on December 14, hampering efforts to steer Asia’s fourth-largest economy through the choppy waters of US tariffs.

Prime Minister Han Duck-soo, who has been serving as acting president, announced on Thursday he would resign before an expected entry into the presidential race.

But the person who was set to replace him as acting leader, Finance Minister Choi Sang-mok, then abruptly resigned as well, when parliament restarted impeachment proceedings against him for decisions he made when previously serving as acting president.