South Korean court throws likely next president into jeopardy

Lee Jae-myung, the presidential candidate of the Democratic Party, speaks during a policy agreement ceremony with the Korean Confederation of Trade Unions at the Korea Press Center in Seoul, South Korea, on May 1, 2025.
Lee Jae-myung, the presidential candidate of the Democratic Party, speaks during a policy agreement ceremony with the Korean Confederation of Trade Unions at the Korea Press Center in Seoul, South Korea, on May 1, 2025.
Chris Jung via Reuters Connect

South Korean opposition leader Lee Jae-myung had a rough day on Thursday. The Supreme Court sent the election law case against him back to a lower court, a move that could extend the country’s political chaos. Lee is the favorite to win the June 3 election, but he could be ousted from office if the court rules against him weeks, months, or even years down the line.

The legal circumstances are murky. If elected, Lee might claim that he’s constitutionally protected from prosecution. But the constitution only gives the sitting president immunity against indictment for crimes — other than treason, as impeached former President Yoon Suk-yeol knows all too well. Lee has already been indicted, setting up a contentious debate if the courts rule against him, according to Eurasia Group’s Jeremy Chan.

“The conservatives will be saying that he clearly committed this crime and was charged before he became president, and the punishment is that he’s not allowed to seek public office, which would invalidate this whole election,” says Chan. “The left will be saying that the highest law in the land says very specifically that the president should be immune from these types of charges, and should focus on governing.”

The conservative ruling party is still reeling from Yoon’s impeachment after his quixotic attempt at a military coup in December. Nonetheless, acting President Han Duck-soo resigned on Thursday to make way for his own bid for the top job, despite grim polling numbers. The Joong Ang Daily, a conservative paper, found 42% of voters are leaning toward Lee, while only 13% back Han.

Then again, given the sword of Damocles hanging over Lee, Han might be willing to roll the dice.

More from GZERO Media

- YouTube

The next leap in artificial intelligence is physical. On Ian Explains, Ian Bremmer breaks down how robots and autonomous machines will transform daily life, if we can manage the risks that come with them.

Britain's Prime Minister Keir Starmer is flanked by Ukraine's President Volodymyr Zelenskiy and NATO Secretary-General Mark Rutte, Denmark's Prime Minister Mette Frederiksen and Dutch Prime Minister Dick Schoof as he hosts a 'Coalition of the Willing' meeting of international partners on Ukraine at the Foreign, Commonwealth, and Development Office (FCDO) in London, Britain, October 24, 2025.
Henry Nicholls/Pool via REUTERS

As we race toward the end of 2025, voters in over a dozen countries will head to the polls for elections that have major implications for their populations and political movements globally.

The biggest story of our G-Zero world, Ian Bremmer explains, is that the United States – still the world’s most powerful nation – has chosen to walk away from the international system it built and led for three-quarters of a century. Not because it's weak. Not because it has to. But because it wants to.