South Korea's ruling party wins local races but loses Seoul in setback to Lee

voters don't want one party running everything
Seoul's mayoral result suggests limits to Lee's mandate despite his strong approval ratings.

A year into his presidency, South Korea's Lee Jae-myung finds himself in the familiar paradox of democratic governance: winning broadly while losing precisely where it counts. Wednesday's local elections handed his Democratic Party twelve of sixteen regional posts and strengthened his parliamentary hand, yet the loss of Seoul — the symbolic and administrative heart of the nation — to a conservative rival serves as a quiet reminder that voters, even satisfied ones, instinctively resist the concentration of power in a single hand.

  • The Democratic Party entered election day with momentum, a fractured opposition, and a president polling above sixty percent — and still lost the race that defined the night.
  • Seoul's mayoral contest flipped from a projected Democratic lead to a decisive conservative victory as ballots were counted through Thursday morning, with winner Oh Se-hoon framing his win as a democratic corrective against one-party rule.
  • A ballot paper shortage at some polling stations briefly suspended voting and triggered a People Power Party demand for a new election — a dispute that faded without escalating but sharpened the sense of contested stakes.
  • President Lee retains a parliamentary majority and strong approval, but with conservatives holding fourteen of sixteen regional posts, his ability to push policy into the regions and build toward 2028 is meaningfully constrained.
  • Independent conservative Han Dong-hoon's win in Busan introduces a wild card into opposition politics — either a nucleus for anti-Yoon reformists to coalesce around, or a new fault line deepening the conservative fracture.

South Korea's ruling Democratic Party won twelve of sixteen mayoral and provincial posts in Wednesday's local elections, and strengthened its parliamentary position through concurrent byelections. But the night's defining result was a loss: Seoul, the country's political and symbolic center, went to Oh Se-hoon of the conservative People Power Party, undercutting President Lee Jae-myung's bid to consolidate power as his presidency entered its second year.

Lee had reason to expect more. The People Power Party remained weakened and divided following former President Yoon Suk Yeol's removal from office and life sentence for his 2024 martial law declaration. Early exit polls had shown the Democratic candidate ahead in Seoul. But as counting continued into Thursday morning, Oh pulled decisively ahead, declaring in his acceptance speech that Seoul's future had grown brighter — a pointed framing of his victory as a check on single-party dominance.

The stakes are practical, not merely symbolic. Local leadership posts shape how national policy reaches the regions and determine which party can build electoral infrastructure for the future. With conservatives holding fourteen of sixteen regional posts, Lee faces real friction in advancing regional initiatives or preparing for the 2028 parliamentary elections — friction that a Seoul victory would have eased considerably. His approval ratings remain above sixty percent, and he has been credited with steady diplomacy and transparent governance, but the regional imbalance limits his reach.

A brief controversy over ballot paper shortages at some polling stations added tension to the night. The People Power Party called for a new election; the Democratic Party dismissed the demand entirely. The dispute dissolved without consequence, but it reflected how charged the atmosphere had become.

Meanwhile, the conservative party's internal fractures may prove the more consequential story. Reformists who backed Yoon's impeachment remain at war with loyalists who defended him. Han Dong-hoon, expelled from the party after joining the impeachment push, ran as an independent in Busan and won — a result that could either seed a genuine third force in Korean politics or simply deepen the divide that already threatens conservative coherence heading into 2028.

South Korea's ruling Democratic Party claimed victory in Wednesday's local elections, winning twelve of sixteen mayoral and provincial posts. But the loss that stung was the one that mattered most: the Seoul mayor's race went to the opposition conservative party, a result that undercut President Lee Jae-myung's effort to consolidate political power just as his presidency entered its second year.

Lee had every reason to expect a sweep. His Democratic Party held the momentum. The conservative People Power Party, the traditional rival, remained fractured and weakened after President Yoon Suk Yeol was removed from office and sentenced to life in prison for his martial law declaration in late 2024. Experts had predicted the Democratic Party would capitalize on this chaos. Instead, the party won the races it was supposed to win—nine of fourteen parliamentary seats in concurrent byelections, plus a solid majority of regional posts—but stumbled where it needed to succeed. The Seoul mayoral race, the crown jewel of local politics, went to Oh Se-hoon of the People Power Party. Early exit polls had shown the Democratic candidate, Chong Won-o, ahead. As votes were counted through Thursday morning, Oh pulled ahead decisively. "Seoul's future has become brighter," Oh said in his acceptance speech, framing the result as a check on single-party dominance. Chong conceded with measured language, saying he "heavily and humbly" accepts the result.

The loss matters because local leadership posts are not ceremonial. They shape how policy flows from the capital to the regions, and they determine which party can build infrastructure for future elections. Lee, who won his snap election a year earlier after Yoon's ouster, still commands approval ratings above sixty percent. He has been credited with what he calls pragmatic diplomacy—a foreign policy approach that has reassured the United States and Japan about his intentions—and with overseeing a strong stock market and more transparent government procedures. His parliamentary majority was even strengthened by Wednesday's byelections. But the Democratic Party currently holds only two of sixteen regional leadership posts. The People Power Party holds fourteen. That imbalance means Lee cannot easily implement regional policies or prepare his party for the 2028 parliamentary elections without negotiating with opposition-controlled regions. A Seoul victory would have shifted that calculus entirely.

The Seoul race itself was briefly turbulent. The election commission announced a shortage of ballot papers in some polling stations, causing a temporary voting suspension. The People Power Party demanded a new election, calling the shortage a serious violation of voters' rights. The Democratic Party rejected the demand outright, calling it "not even worth considering." The dispute passed without escalating further, but it underscored the stakes.

The broader conservative collapse, however, may prove more significant than the Seoul loss. The People Power Party is still tearing itself apart. Reformists who joined the Democratic Party's push to impeach Yoon are at odds with Yoon loyalists who tried to protect him. One reformist, Han Dong-hoon, who was eventually expelled from the party, ran as an independent in Busan, the country's second-largest city, and won his parliamentary seat. That victory could reshape opposition politics. Some analysts see it as a chance for anti-Yoon reformists to regroup and emerge as a genuine third force. Others worry it will deepen the conservative divide, pushing Yoon loyalists to close ranks and harden their positions. Either way, the conservative party's internal war is far from over, and the 2028 elections will be fought on terrain still being defined.

Seoul's future has become brighter. Our citizens ensured that the Republic of Korea does not tilt excessively toward one direction and preserved Seoul as democracy's last safeguard.
— Oh Se-hoon, newly elected Seoul mayor
The Democratic Party's defeat in the Seoul race was painful, though the party thanks voters for wins in other races.
— Jung Chung-rae, Democratic Party leader
A Conversa do Hearth Outra perspectiva sobre a história
Inventor

The Democratic Party won most of the races. Why does losing Seoul feel like a defeat?

Model

Because Seoul is where power concentrates. It's the capital, the symbolic center. Winning twelve of sixteen posts sounds dominant until you realize the opposition still controls the regions that matter most for implementing policy and building for the next election cycle.

Inventor

But Lee's approval is above sixty percent. Doesn't that insulate him?

Model

Approval and political leverage are different things. Lee can be popular and still find himself negotiating with opposition mayors and governors who control resources and can obstruct his agenda at the local level. The vote also suggests something: voters don't want one party running everything, even if they like the president.

Inventor

What about the ballot shortage controversy? Did that change the outcome?

Model

It's unclear. The shortage was real but brief. The Democratic Party rejected calls for a new election, and the dispute didn't escalate. But it revealed how thin the margin of trust is—both parties were ready to fight over procedure.

Inventor

The conservative party seems to be imploding. Is that good news for Lee?

Model

Not necessarily. A fractured opposition is unpredictable. Han Dong-hoon's independent victory could either splinter conservatives further or force them to unite out of desperation. Either way, Lee faces a messier political landscape than he might have hoped.

Inventor

What happens next?

Model

Lee's foreign policy and economic agenda likely continue unchanged. But he'll need to negotiate more with opposition-controlled regions, and the conservative party will spend the next two years figuring out whether it can survive its internal war. The 2028 parliamentary elections will be the real test.

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