US Midterm Elections November 3, 2026: Republican Party retains Senate majority (net ≥51 seats, confirmed by AP or NBC News by November 4, 2026)
Miss
✦ AI-generated prediction
Published on 11. September 2026
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Predicted for 3. November 2026
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Based on: Speculative
Metaculus (September 2026) gives Republicans ~59% probability of Senate majority; Polymarket and RealClearPolling confirm ~59–62%. Of 35 seats up for election, Republicans currently hold 53 vs. 47 Democrats. Democrats need a net gain of +4 seats — the Senate map favors Republicans (23 R seats vs. 12 D seats in play). Consistent with open Cassandra prediction 'Democrats win House with ≥6 net seats': a split Congress with Democratic House and Republican Senate is the most likely scenario (Metaculus: 49.2%).
Data basis for this prediction
- Metaculus 'US Senate plurality after 2026 midterms': Republikaner ~59 % (Stand September 2026)
- Polymarket 'Which party will win the Senate in 2026': ~60 % Republikaner (September 2026)
- 270toWin.com / RealClearPolling Senate Map 2026: Stand September 2026
- Metaculus Congressional Control Scenarios: Rep Senate + Dem House 49,2 % wahrscheinlichstes Szenario
Verdict: Miss
Die Vorhersage ist klar nicht eingetreten. Laut NBC News (nbcnews.com/politics/2026-elections/senate-results) gewannen die Demokraten die Senatsmehrheit mit 54 zu 44 Sitzen – sie flippten mindestens 7 republikanische Sitze (u.a. Texas, Kansas, Iowa, Ohio, North Carolina, South Carolina, Maine). Damit übertrafen die Demokraten das nötige Netto-Plus von +4 Sitzen deutlich. Die Prognosemodelle (Metaculus 59 %, Polymarket 59–62 % für Republikaner) unterschätzten die Stärke der demokratischen Welle, die sich als historisch erwiesen hat – vergleichbar mit 2008. Die Senats-Karte, die als strukturell vorteilhaft für Republikaner galt, wurde durch hohe demokratische Beteiligung und Ablehnung der Trump-GOP überwunden.
🏛️ Politics
✦ AI
Democrats won both chambers historically at the November 3, 2026 midterms (Senate 54:44, House 258 seats — largest majority since 1993). Trump's disapproval rating stands at 62% (FiveThirtyEight, Nov 2026). Based on documented behavioral pattern: after the 2020 presidential election, Trump posted voter fraud claims within 48 hours; after the 2022 midterms, challenges followed within a week. Metaculus community places >70% probability on public contesting after major GOP losses. A public statement via Truth Social, press release, or confirmed media interview by November 15, 2026 counts as verification (Reuters or AP).
🏛️ Politics
✦ AI
Ukrainian, US, and Russian negotiators convene November 10–11 in Abu Dhabi. Russia conducted large-scale long-range strikes on Ukrainian energy infrastructure and logistics hubs on November 3–4; Ukraine responded with drone strikes on the Ryazan refinery. Positions on territory and security guarantees remain far apart. No Polymarket or Kalshi market covers this specific event; historical base rate for failure of comparable trilateral talks: >80%.
🏛️ Politics
✦ AI
Spain holds a general election on 29 November 2026. Polymarket prices Feijóo as next PM at 85%, Kalshi at 82% — both serve as anchors. A separate Polymarket market gives PP+Vox a 92% probability of a joint majority (>176/350 seats). Current polls (Sondaxe) show PP at 29.2% narrowly ahead of PSOE (26.9%); Vox is tracking slightly higher. Feijóo failed to form a government in 2023, but market odds reflect the lesson learned: PP+Vox is now seen as stable enough. No deviation from market anchor warranted.