Seoul Is Already Called for DPK
On Polymarket: 2026 Seoul Mayoral Election Winner ↗With a 15-point polling lead, a locked-in nomination, and an indicted incumbent, Jeong Won-oh's path to Seoul City Hall is the least uncertain thing in Korean politics right now.
Current view — April 15
Start with the map, not the candidates. Seoul's political terrain has shifted so dramatically since the PPP's collapse that the race is, in a meaningful sense, already decided at the structural level. Party support in the capital now sits at DPK 50.2% versus PPP 27.4% — a gap that has widened by roughly 12 points since September 2025. When one party commands nearly twice the ambient support of its rival in the city being contested, the individual matchup becomes almost a formality.
Seoul (Population: 9.3M)
Incumbent: Oh Se-hoon (PPP)
Party support in Seoul (vs September 2025)
🔵 DPK (liberal): 50.2% (+7.5)
🔴 PPP (conservative): 27.4% (−4.4)
🔵 Rebuilding Korea Party (S&D): 2.7% (+0.5)
🟠 Reform Party… pic.twitter.com/W4nUJPk3WJ
The Gallup Korea numbers on the actual mayoral contest confirm that the structural advantage has translated cleanly into candidate-level support. DPK leads PPP 52% to 37% in the Seoul mayor race with the June 3 vote still weeks out. Leads of this size, embedded in this kind of partisan environment, are not the sort that dissolve on their own. They require a shock. We do not see one coming from the DPK side.
Seoul Mayor:
🔵 DPK 52%
🔴 PPP 37%
Gyeonggi Governor:
🔵 DPK 56%
🔴 PPP 27%
Incheon Mayor:
🔵 DPK 49%
🔴 PPP 33%
Gangwon Governor:
🔵 DPK 48%
🔴 PPP 37%
Daejeon Mayor:
🔵 DPK 55%
🔴 PPP 28%
South Chungcheong Governor:
🔵 DPK 51%
🔴…
Jeong Won-oh enters the general having cleared his own house first. He won the DPK primary decisively, defeating both MP Park Ju-min and Jeon Hyeon-hee, which means he arrives at the main event without a fractured base or a cycle of intra-party recrimination to manage. That matters operationally — a unified candidate in a favorable environment is precisely the combination that converts polling leads into actual results.
On the other side of the ledger, Oh Se-hoon's indictment on Political Funds Act charges has done something polling alone cannot fully capture: it has neutralized the incumbent's single greatest asset, which was his four-term identity as Seoul's builder-mayor. Legal exposure suppresses donor willingness, volunteer enthusiasm, and the kind of earned media that an incumbent relies on to stay relevant. The PPP is now defending a damaged brand at the worst possible moment in the cycle.
We take some note of the more cautious read in this market — one participant flagged certain polling snapshots as "effectively tied" and urged watching the DP nomination process before committing fully. That posture is reasonable tradecraft. But the same observer still called Jeong a "slight favorite" and framed any dip as an accumulation opportunity rather than a warning sign, which tells us the skepticism is about timing, not direction.
There is also a less analytical but not unimportant signal in how DPK supporters talk about this race. When a market participant responds to expressed doubt by asking whether anyone seriously underestimates a candidate described as Lee Jae-myung's closest political ally, the subtext is organizational depth — the kind that comes from being wired into the dominant national party apparatus.
The residual uncertainty in this market is real but thin. It prices the possibility of a systemic surprise: a late legal development on the DPK side, a dramatic PPP rehabilitation, a turnout anomaly in conservative-leaning districts. None of those scenarios have a visible catalyst right now. What we have instead is a wide polling lead, a clean nomination, and a hobbled incumbent — the standard ingredients of a race that ends the way everyone expects it to.