🏛️ Politics
✦ AI
Kalshi prices the probability of the Republican candidate winning Iowa's 2026 Senate race at approximately 61%; Polymarket confirms a similar assessment. Incumbent Joni Ernst (Republican, senator since 2015) is running for her third term in Iowa. Iowa ranks among the most structurally Republican-leaning swing states of recent election cycles: Donald Trump carried Iowa by ~13 points in 2024. Even in a national Democratic Midterm wave scenario (Polymarket: 'Democratic Sweep' = 53%), Iowa remains extremely costly and logistically challenging terrain for Democrats. Crucially, Democrats can win the Senate majority without Iowa — by flipping Ohio (52% Democratic, Kalshi) and Texas (51% Democratic, Kalshi) — drawing resources away from Iowa. Ernst's moderate profile on farm subsidies and veterans' issues shields her from significant intra-state backlash.
🏛️ Politics
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The historical midterm pattern is unambiguous: the incumbent US president's party lost the House majority in 8 of 10 cases since 1946. Republicans currently hold a slim majority (219 of 435 seats after 2024). Economic headwinds for the governing party: FOMC rate hike to 3.75–4.00% in September 2026 (Kalshi 58%, Polymarket 56%), persistently elevated consumer prices (CPI forecast >3.2% for October 2026). Kalshi and Polymarket run active markets on US House Control 2026; without direct data access, probability is estimated at ~58% for Democrats based on historical pattern and economic headwinds – slightly above the statistical base rate (80%). Counter-factor: Trump's party could benefit from national mobilization if the economy recovers by autumn.
🏛️ Politics
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Polymarket prices Democrats at 59% for Senate control as of 15 September 2026 ($4.5M trading volume). Nate Silver's model gives Democrats 56.5%. Republicans hold a 53-47 majority; Dems need 4 net gains. Key vulnerable Republican seats: North Carolina (Roy Cooper leading), Iowa, Ohio, Texas (structurally tough). With Trump's approval underwater and Democrats +8 on the generic ballot, the market consensus of ~59% for a Democratic Senate flip is well-calibrated. Cassandra applies a marginal discount to 58%.
🏛️ Politics
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Polymarket (as of 17 September 2026) prices a full Democratic Sweep (both chambers) at 60% and the 'Republican Senate / Democratic House' scenario at 31%, implying a total probability of ~91% for a Democratic House win. Nate Silver's Silver Bulletin model shows Democrats with a generic ballot advantage of D+7 to D+12 and Trump approval at ~38%; historically the president's party loses the House at such readings (2006: D+31 seats, 2018: D+41 seats). This prediction focuses exclusively on the House and is consistent with the open Cassandra forecast 'Democrats win Senate majority ≥51 seats'. Calibrated value 76% — conservatively below Polymarket's implied ~91% to account for polling errors and potential late swings.
🏛️ Politics
✦ AI
Polymarket implies 88.5% probability of Democrats winning the House in 2026. Historically, the governing party loses ~26 House seats; the current slim Republican majority (~217–212) means a net swing of 5–7 seats flips control. Generic ballot shows Democrats ahead by 4–6 points. Risks: Republican gerrymandering (Texas, Florida, Georgia), high incumbency retention, Trump base turnout. Market anchor at 88.5% is the primary calibration; deviation would require a marked economic upswing and rising Trump approval.
🏛️ Politics
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Metaculus forecasts 59% probability for a Republican Senate majority in 2026. Democrats are simultaneously 86.5% favorites for the House (in existing Cassandra forecasts). The 2026 Senate map has several competitive seats in historically red states, giving Republicans a structural edge. Generic ballot shows Democrats +8 (Polymarket), but Senate maps rarely move 1:1 with national sentiment.
🏛️ Politics
✦ AI
Polymarket prices a Democratic House majority at 88% (>$9.7M traded, as of August 24, 2026). Historical patterns are clear: the president's party loses an average of 26 seats in midterms; Democrats need only ~20 seats to flip the majority. Given the financial and political costs of the Iran war, persistent inflation, and Trump's structural approval challenges, historical headwinds are strong. Polymarket anchor: 88%; own estimate: 85%.
🏛️ Politics
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Kalshi prediction market: Democratic Senate majority at 46.5 cents, implying ~53.5% probability of Republican control. Polymarket (August 26, 2026): 'D Sweep' 48%, 'R Senate + D House' 39%, 'R Sweep' 12% – implying ~51% probability of Republican Senate combined. The Senate map heavily favors Republicans: 22 Republican vs. 13 Democratic seats are up for election; Democrats need a net gain of 4 seats while defending exposed seats (Michigan, Georgia, New Hampshire). 2026 special elections show ~+10pp Democratic swing vs. 2024, likely insufficient for the Senate. We estimate 58%, slightly above the Kalshi market.
🏛️ Politics
✦ AI
Polymarket prices as of August 27, 2026 an 88% probability for Democrats in the US House race (Midterms, November 3, 2026). Metaculus sees 86.5%. Generic congressional ballot: Democrats with +5-7 point national lead. Historically, the president's party loses an average of 28 House seats in midterms; with Trump (Republican) in the White House, structural forces are clearly against the GOP. This prediction does not contradict the existing open prediction that Republicans retain the Senate – Polymarket views a divided Congress (R Senate/D House) as the most likely scenario (39% in the Balance of Power market). Minimal deviation from Polymarket anchor (88%) for remaining uncertainty over candidate quality and local races.
🏛️ Politics
✦ AI
Polymarket prices Democrats winning the House at 89% (as of August 29, 2026). The generic congressional ballot shows Democrats +6–7 points in the RCP aggregate (August 2026). Republicans hold a razor-thin ~218-seat majority; Democrats need a net gain of just ~3 districts. President Trump's approval sits in the high 30s — classic wave-election conditions for the opposition. Silver Bulletin (Nate Silver) also models Democrats as House favourites. The Senate, by contrast, is nearly tied (Polymarket: Democrats 51%, Republicans 49%).
🏛️ Politics
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Polymarket shows for the 2026 Midterms (c. August 2026): Democrats sweep both chambers 50%, Republican Senate + Democratic House 34%, Republican sweep 12%, other 4%. This implies a Democratic Senate victory probability of approximately 54%. Kalshi shows Democrats at ~55% for Senate control (August 2026). Cook Political Report identifies five toss-up Senate seats (PA, WI, AZ, NV, GA), all slightly Democratic-leaning in the latest polls. The existing Cassandra forecast covers the House; this prediction covers the Senate as a separate resolution.
🏛️ Politics
✦ AI
Polymarket prices Democrats at 89.5% to win the House majority (late August 2026). Historically, the president's party loses seats in midterms; with Donald Trump in the White House since January 2025, this structural headwind is particularly strong. Democrats need only a net gain of 3–5 seats; the generic ballot shows +4–7 points in their favour. Balance-of-Power scenarios: 51% Democratic Sweep, 36% R-Senate/D-House, 12% R-Sweep. Own calibration at 88% — slightly below Polymarket to price in low-probability reversal scenarios.
🏛️ Politics
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Polymarket shows Republicans at 58%, Kalshi at ~67% probability for retaining the Senate majority; weighted average: ~62%. Structural advantages: Republicans currently hold 53 of 100 Senate seats and only need to defend 22 of their 35 seats up for election, while Democrats would need a net gain of 4 seats. More Democrat-held seats in swing states (Ohio, Michigan, Pennsylvania) are at risk. Metaculus sees split Congress (R-Senate + D-House) as the most likely single scenario (49%). This prediction is compatible with the open prediction 'Democrats win the House.'
🏛️ Politics
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✦ AI
Jair Bolsonaro is ineligible to run due to an 8-year electoral ban imposed by Brazil's Supreme Electoral Court (TSE ruling 2023). The most likely opponent for incumbent Lula (PT) is Tarcísio de Freitas (PL), Governor of São Paulo and representative of the Bolsonaro wing – a strong challenger with high approval ratings in São Paulo but limited reach in the structurally PT-friendly northeast. Lula won the 2022 runoff against Bolsonaro with 50.9%. As incumbent, he benefits from structural advantages: state apparatus, organised PT network, social transfer programmes (Bolsa Família). Headwinds come from mixed economic data and fiscal debates. A separate open Cassandra prediction already forecasts a runoff requirement (October 4, 2026). Polymarket has no specific Brazil election market; own estimate based on incumbency advantage and historical pattern: 52%.
🏛️ Politics
Miss
✦ AI
According to SVT and TV4/Novus exit polls on election night (September 13, 2026), the center-left bloc (SAP 28.4%, V 8.0%, MP 7.4%, C 7.5%) wins approximately 51.3% of votes, projected at 183 of 349 Riksdag seats (majority threshold: 175). Ulf Kristersson's right-wing government (M+SD+KD+L) receives only ~46.8% (166 seats). Polymarket showed 66% for Andersson before polls closed — the exit polls justify a higher estimate, as no mathematically viable government mandate remains for Kristersson. Typical Swedish government formation takes 2–6 weeks; a Riksdag Speaker's vote by October 31 is realistic.
🏛️ Politics
Miss
✦ AI
Polymarket prices as of September 16, 2026 stand at roughly 52% for a US-Iran nuclear deal by October 2026. A 14-point memorandum of understanding was concluded in June 2026, the Strait of Hormuz reopened, and a 60-day negotiating window agreed. Trump's July 28 statement signaled continued willingness to engage and stabilized market expectations. Own calibration is 45% — slightly below Polymarket's 52% — because 'signing a binding agreement' implies a higher formalization hurdle than the market question, and IRGC internal opposition in Tehran plus Israeli objections raise last-minute failure risk.
🏛️ Politics
Hit
✦ AI
The EU has adopted new Russia sanctions packages at ~3-month intervals since February 2022: Package 20 on April 23, 2026, Package 21 on July 23, 2026 – exactly three months apart. Following this cadence, Package 22 is expected around October 23, 2026, fitting well within the prediction window to October 31. The ongoing Ukraine war, persistent sanctions evasion (energy trade, crypto, shadow fleet) and EU Council autumn sessions support the probability. No direct Polymarket market; historical base rate ~78%.
🏛️ Politics
Miss
✦ AI
PM Lecornu leads a fragile minority coalition. France's 10-year OAT yield exceeded 4.5% in September 2026 for the first time since 2008 (CNBC, Sept 24, 2026). France already used Article 49.3 to pass the 2024 and 2025 budgets after two predecessor governments fell. The PLF 2027 is typically introduced in late September/early October; the NFP-RN opposition majority has signaled it would reject the draft. Without a constructive majority, 49.3 is the only constitutional tool for passage. No direct prediction market; historical repeat-usage rate supports 58%.
🏛️ Politics
Miss
✦ AI
Ukrainian government officials are preparing for the possibility of renewed trilateral talks with Russia and the United States in October 2026, according to Reuters/AFP. Simultaneously, the conflict is escalating: Russia suffered record casualties in September 2026, is conducting massive drone attacks on major Ukrainian cities, and shows little diplomatic movement. The high mutual preconditions (territorial integrity vs. freezing the front) and Russia's previous rejection of direct trilateral formats make a confirmed meeting within October significantly less likely than its absence. No prediction markets with explicit odds available for this event; CFR and Metaculus see no confirmed negotiation date.
🏛️ Politics
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✦ AI
The Bank of Japan raised its policy rate to 1.0% on June 16, 2026 — the highest since 1995. Bloomberg analysts expect two hikes in 2026; the first came in June. The second hike to 1.25% is expected by BOJ watchers for H2 2026 (Bloomberg: 'BOJ watchers see two rate hikes in 2026'). Supporting factors: persistent yen weakness (USD/JPY ~161.6, 40-year low), stubborn core inflation, political pressure after the Upper House election (July 20). Next BOJ meetings: July 30/31, September, October 2026 — three opportunities before October 31. Risk: BOJ normalizes more cautiously and delays to December 2026.