Tools chosen: polymarket_direct polymarket_related kalshi_related claude_news gdelt_news wikipedia code_execution

Sub-questions (Fermi decomposition)

Planner reasoning

This is a Polymarket political-survival question with a very low base rate: South Korean presidents rarely leave office mid-term (Park Geun-hye 2017 is the only impeachment-completed case; Yoon in 2024-25 is the second). Lee Jae-myung took office June 2025 with a large DP majority in the National Assembly, making impeachment procedurally near-impossible, and sitting presidents have immunity from prosecution except insurrection/treason. Key research: current market price/history, any active impeachment or health/legal threats, approval ratings, and cross-venue prices.

# Current state Lee Jae-myung remains in office as South Korea's president (sworn in June 2025); the Kalshi/Polymarket question resolves YES only if he ceases to hold the presidency (resignation, removal, impeachment, incapacitation) at any point through Dec 31, 2026. Current polling shows sliding approval, but no impeachment motion has been filed and the ruling Democratic Party (DP) holds a legislative majority, making the constitutional 200-vote (two-thirds) threshold for impeachment unreachable without mass DP defection. # Timeline of key events - 2024-01: Lee survives a knife/assassination attempt (confirmed, pre-presidency). [wikipedia] - 2024-04-10: National Assembly elections; DP-led opposition retains majority (254+46 seats structure). [wikipedia] - 2024-11: Lee convicted under Public Official Election Act (pre-presidency case). [wikipedia] - 2025-04: Constitutional Court removes Yoon Suk-yeol via impeachment (confirmed). [wikipedia] - 2025-06-03/04: Lee elected president, sworn in immediately (confirmed). [wikipedia] - 2025 (post-election): Five pending criminal trials against Lee (incl. Daejang-dong, election law) suspended by law during his presidential term (confirmed). [claude_news] - 2026-06: Lee marks one year in office; approval ~60%, second-highest 1-yr mark since 1987 (reported). [claude_news/Carnegie] - 2026-06-28/29: National Assembly petition demanding Lee's impeachment surpasses 100,000 signatures; no realistic legislative path given DP majority (reported). [koreaherald] - 2026-07: Diplomatic/economic wins — chip deals with US, Nvidia/SK partnership, naval-shipbuilding cooperation with Trump, Mongolia summit (confirmed/reported, context of continued normal governance). [gdelt] - 2026-06 to 2026-08: Approval declines steadily — Gallup Korea 51%→44% (record low) by mid-Aug; Realmeter 43%, fifth consecutive weekly decline, first time negative exceeds positive (reported). [UPI, Korea Times, JoongAng] - 2026-08-14/17: Approval hits new lows amid housing policy and National Election Commission ballot-handling controversies (reported). [UPI, Korea Times] # Event Will Lee Jae-myung cease to be President of South Korea (resign, be removed, impeached, or permanently incapacitated) at any point between market creation and Dec 31, 2026? # Outcomes to forecast Yes / No # Kalshi market anchor No native Kalshi price for this exact ticker was returned; closest analog **KXFULLTERMSKPRES-29 ("Will Lee serve full term?" — Yes)** trades at **53%** YES (i.e., ~47% implied chance of NOT serving full term — a much longer horizon than just 2026), down sharply (-30pts over 30 days) with only 40 days of data and volume ~208 contracts/day — thin, volatile market. Polymarket's own identical-question market prices YES (out in 2026) at **9.9%**, up modestly (+0.5% 7d, +0.35% 30d), range 6.9–12.9% over 90 days, $270K volume — this is the most directly comparable anchor. # Sub-question answers 1. **Polymarket price/history** — Current 9.9% YES, 90-day range 6.9–12.9%, slight upward drift; $270K total volume. [polymarket_direct] 2. **Assembly composition/impeachment votes** — DP holds a majority in the 300-seat Assembly (2024 election); PPP cannot reach the 200-vote (two-thirds) threshold without large DP defections; no active impeachment motion exists. [wikipedia, claude_news] 3. **Active proceedings** — No impeachment motion or Constitutional Court case pending against Lee; a 100,000-signature petition (June 2026) has no realistic path. His five pre-existing criminal trials (Daejang-dong, election law) are legally suspended during his term per statute, expected to resume after term ends 2030. [koreaherald, claude_news] 4. **Approval/unrest** — Approval fell from ~60% (mid-2026) to record lows of 43–44% by August 2026 (Gallup/Realmeter) amid housing policy and election-commission controversies; no reports of mass protests or coalition breakdown threatening resignation. [UPI, Korea Times, JoongAng] 5. **Base rate** — Historical analysis: 2 of 8 SK presidencies (1988–2025) ended in forced removal (Park 2017, Yoon 2025); annualized hazard estimates range ~5% (long-run) to ~15% (recent volatile era); blended central estimate ~7–10%/year. [code_execution] 6. **Health/security** — No new 2026 health or security incidents reported; 2024 stabbing is the only precedent, with no recurrence noted. [claude_news] 7. **Comparable markets** — Kalshi's KXFULLTERMSKPRES-29 (full-term through entire 5-yr term) at 53% YES is not directly comparable (different horizon/question); no other Kalshi or Polymarket markets specific to 2026 impeachment found besides the primary ticker. [kalshi_related, polymarket_related] # Key facts (high-confidence, factual) 1. [wikipedia] Presidential impeachment requires 2/3 Assembly vote (200/300) plus Constitutional Court 2/3 (6/9 justices) confirmation. 2. [wikipedia] DP holds legislative majority since April 2024 election; term runs through May 2028. 3. [claude_news] Lee's five pre-election criminal cases are suspended by law during his presidency. 4. [UPI/Korea Times] Approval fell to record lows (43–44%) by mid-August 2026, first time negatives exceed positives. 5. [code_execution] 2 of last 3 SK presidents (Park, Yoon) were removed via impeachment — elevated recent-era base rate. # Cross-market signals - Kalshi related: KXFULLTERMSKPRES-29 at 53% YES (full term, longer horizon) — fell 30pts in 30 days, signaling rising perceived risk generally, but not directly comparable to 2026-only window. - Polymarket: identical-question market at 9.9% YES, stable/slightly rising. - No sportsbook analog exists for this event type. # Analyst opinions and speculation - Carnegie Endowment/ABC News frame Lee as institutionally secure (large majority, strong first-year support) despite "legal shadow" from suspended trials. [carnegieendowment, abcnews] - Polymarket-linked commentary on a separate "impeached before 2027" market states no credible impeachment motions or resignation pressure currently exist. [claude_news] # Directional lean per outcome - **Yes**: Declining approval (record lows), petition momentum, base-rate history of SK presidential removals (2 of last 3), suspended criminal cases creating latent legal risk once term-related protections lapse. - **No**: DP holds impeachment-blocking majority; no active impeachment motion or court case; no health/security crisis; economic/diplomatic wins (chip deals, Trump cooperation) bolster standing; both Polymarket (9.9%) and base-rate-blended estimates (~7–10%) point to low probability. # Gaps / unknowns - No direct Kalshi price for the exact ticker was retrieved (only the longer-horizon full-term market). - Unclear whether declining approval trend continues or stabilizes into Q4 2026. - No visibility into any behind-the-scenes DP factional risk or coalition stress. # Calibration anchors - Polymarket identical market: 9.9% YES (primary anchor). - Kalshi analog (different horizon): 53% YES for "serve full term." - Base-rate model: ~7–10% central estimate for removal in any given year.

1. Both forecasters anchor almost entirely on the Polymarket 9.9% price and barely engage with the Kalshi analog's steep -30pt move in 30 days, which — even if a different horizon — signals rapidly rising perceived tail risk that neither forecast explicitly incorporates into a forward-looking adjustment (e.g., momentum in approval decline continuing into Q4). 2. Neither forecast grapples with the mechanism gap: impeachment via Assembly is nearly impossible given DP's majority, but the brief explicitly notes "resignation... or permanently incapacitated" also count as YES — voluntary resignation under scandal pressure (e.g., election-commission controversy, housing policy backlash) is a distinct pathway that doesn't require 200 votes, and both forecasts treat impeachment mechanics as if they were the only route to YES. 3. Both cite the "2 of last 3 presidents removed" base rate but then effectively discard it in favor of the Polymarket price without reconciling why the structural/legislative argument should dominate a base rate that reflects genuine tail volatility in Korean politics (weaponized prosecutions, snap scandals) — this is a reference-class tension neither resolves explicitly. 4. Neither forecast discusses the possibility that suspended criminal trials could be reactivated by a Constitutional Court ruling on the suspension statute itself (a legal risk vector distinct from impeachment), which the brief flags as "latent legal risk" under the Yes case but that gets no analytical treatment in either rationale. 5. Both forecasts land within 3pts of each other (6% vs 9%) and both below the Polymarket anchor for similar generic reasons ("shorter window," "long-shot premium") — this convergence suggests anchoring bias on the same data point rather than independent verification, and neither stress-tests whether the accelerating approval decline (60%→44% in two months) could continue into a genuine political crisis by Q4 2026. 6. The 100,000-signature petition and NEC ballot controversy are treated as minor/dismissable, but neither forecast quantifies how a scandal escalation (e.g., if NEC issue implicates Lee directly) could rapidly shift DP internal calculus — the "no coalition stress visibility" gap is acknowledged in the brief but not stress-tested as a scenario in either rationale.

8% (68% confidence)

Yes: 8% No: 92%

The identical-question Polymarket market at 9.9% is the cleanest anchor; the Kalshi 53% 'full term' contract covers a 5-year horizon through 2030 and its -30pt slide reflects longer-run legal/political risk rather than a 2026-specific hazard, so it justifies only a modest upward nudge. Structurally, removal via impeachment is near-impossible with the DP holding a blocking majority through 2028 and no motion filed — only a symbolic petition — while Lee's criminal trials are statutorily suspended during his term. The critique's fair points (voluntary resignation under scandal pressure, possible reactivation of suspended trials, and an accelerating approval slide from ~60% to 43-44%) are genuine non-impeachment pathways, but with roughly four months left in the window and no mass protests or coalition fracture reported, they add only a few points of tail risk. I therefore land just modestly below the Polymarket price — reflecting typical long-shot premium on binary 'ouster' markets and the short remaining window — but higher than Forecast 1's 6%, which under-weights the non-impeachment routes flagged by the red team.

Total pipeline time: 258.0s