Democratic Party wins majority in the US Senate at the 2026 Midterms (November 3, 2026, confirmed by AP or NBC News by November 7, 2026)
Pending
✦ AI-generated prediction
Published on 23. September 2026
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Predicted for 3. November 2026
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Based on: Speculative
Polymarket sees 66% probability for a Democratic Senate majority (as of September 23, 2026); Metaculus sees 59% for a Republican majority — both markets show a tight but slightly pro-Democratic race. Key swing-state races: Texas (Talarico D vs. Paxton R: ~62% Democrat), Ohio (Brown D vs. Husted R: ~63% Democrat), Maine (Jackson D vs. Collins R: ~74% Democrat), Iowa (50/50). Historically, the opposition benefits from anti-incumbent sentiment in midterms: Trump's second term, the US-Iran crisis, and persistent core inflation above 3% (US Core PCE ≥3.1% per open Cassandra prediction) should provide mobilization tailwind. Caveat: Structurally difficult 2026 Senate map (Democrats defending more seats) and gerrymandering effects could flip individual seats. The separate open House majority prediction (Democrats 93% per Polymarket) is independent of this.
Data basis for this prediction
- Polymarket: 'US Senate 2026 — Which party wins?' — Demokraten 66%, Republikaner 35% (Stand 23. September 2026)
- Metaculus: 'US Congress Control After 2026 Midterms' — Republikanische Senatsmehrheit 59% (Stand 23. September 2026)
- Polymarket Einzelrennen: Texas Dem 62%, Ohio Dem 63%, Maine Dem 74%, Iowa 50/50 (Stand 23. September 2026)
Verdict: Pending
This prediction is still open. It will be evaluated automatically against real-world sources after its due date.
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✦ AI
Datafolha (September 15-17, 2026): Lula 39%, Flávio Bolsonaro 31% in the first round — an 8-percentage-point lead. AS/COA tracker and BTG Pactual/Nexus confirm Lula's consistent first-round lead (runoff: Lula 46% vs. Bolsonaro 45% — much tighter). This prediction is consistent with but strictly separate from open predictions (Lula >42% and Bolsonaro >35%): both can coexist without Lula necessarily leading. The 80-year-old Lula holds a structural advantage in the first round as incumbent with a broad coalition. Flávio Bolsonaro's runoff surge reflects right-consolidation but does not erode Lula's first-round lead.
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✦ AI
The new Swedish Riksdag constitutes on September 28, with formal parliamentary opening on September 29. Speaker Andreas Norlén tasked Andersson (Social Democrats) with government formation on September 18; the centre-left bloc holds 176 of 349 seats (razor-thin majority). A vote by September 29–30 requires coalition talks to conclude in under two weeks — unlikely given the Left Party/Centre Party standoff (Left insists on ministerial roles; Centre categorically refuses Left Party participation). Base case: vote in the October 1–7 window. The low probability reflects this structural bottleneck.
🏛️ Politics
✦ AI
In Latvia's October 3, 2026 Saeima election, September polls place Apvienotais saraksts (LZP/LRA/LP) at 22.8%—ahead of SV (12.7%), LPV (12.6%), Progresīvie (12.1%), Nacionālā Apvienība (9.4%), and Jaunā Vienotība (8.1%). The lead over second place is 10.1 percentage points. The current ruling coalition is projected at only ~29% of seats under current trends, losing its majority. Polymarket operates an active market for the election winner. Even allowing for typical ±4pp polling error, Apvienotais saraksts would retain first place; however, the >20.0% threshold could be narrowly missed if the party underperforms by ~3pp (occurring in ~20% of cases), reducing the probability slightly below the first-place probability alone.