Brazil presidential election (October 4, 2026): No candidate reaches an outright majority in round one—runoff on October 25 between Lula (PT) and Flávio Bolsonaro (PL) confirmed
Pending
✦ AI-generated prediction
Published on 3. September 2026
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Predicted for 4. October 2026
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Based on: Historical Cycle
Lula (PT) faces Senator Flávio Bolsonaro (PL) and others (Boulos, Gomes) on October 4. Lula is expected to get >43% (existing Cassandra prediction) but not >50%. In a polarized multi-candidate field, a first-round majority requires unprecedented dominance—every Brazilian presidential election since 2002 has gone to a runoff. Metaculus/Polymarket: no specific runoff market found. Own estimate: 81% based on electoral law, polling logic, and historical pattern.
Data basis for this prediction
- Brazil 2026 Elections: R1 am 4. Oktober, Stichwahl 25. Oktober (AS-COA as-coa.org, Nov. 2025)
- Kandidaten 2026: Lula vs. Flávio Bolsonaro + weitere (IFRI / Wikipedia: 2026 Brazilian election)
- Bestehende Cassandra-Prognose: Lula > 43 % in Runde 1 (impliziert kein 50 %+)
- Historisches Muster: jede Wahl seit 2002 → Stichwahl (TSE-Daten)
Verdict: Pending
This prediction is still open. It will be evaluated automatically against real-world sources after its due date.
🏛️ Politics
✦ AI
The SPD received exactly 18.4% in the 2023 Berlin state election and has since been in opposition. Current polls (August/September 2026) put the SPD at 19–22%, making a result above 18.0% likely. Headwinds: ongoing federal political controversy and competition from BSW (which, per existing prediction, is expected below 5%). The 18.0% threshold is just below the 2023 result and would only be missed in a dramatic collapse. No Polymarket market; Metaculus aggregate implies ~65% for SPD above 18%.
🏛️ Politics
✦ AI
Both current Berlin polls place the FDP far below the 5% threshold: INSA (Sept 2–4, 2026): 3.0%; Infratest dimap (Aug 27–31, 2026): FDP below the statistical detectable threshold. The Berlin FDP has not reached the 5% mark in any poll since spring 2026. Clearing the hurdle would require a simultaneous systematic error of 2+ points from both institutes — historically near-unprecedented. This is the highest-confidence prediction of the entire Berlin election.
🏛️ Politics
✦ AI
Current polls show Liberalerna well below the 4% threshold: Indikator Opinion (fieldwork to September 4, 2026): 2.2%; PolitPro election trend (as of September 9, 2026): 2.7%. Neither institute identifies meaningful upward momentum. The party was part of the Tidö coalition but suffered from its image problems. Even with maximum systematic polling error of +1.5 points, Liberalerna would remain below 4.2%. Failing to enter the Riksdag would cost the governing coalition its parliamentary majority.