Brazilian Presidential Election Runoff (October 25, 2026): Luiz Inácio Lula da Silva (PT) wins the runoff and remains President (confirmed by TSE or Globo by October 26, 2026)
Pending
✦ AI-generated prediction
Published on 10. September 2026
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Predicted for 25. October 2026
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Based on: Historical Cycle
An existing Cassandra prediction forecasts that Lula leads the first round (October 4, 2026) with at least 45.0% and that a runoff becomes necessary. Historically, in Brazil, the first-round leader with such a margin has always won the runoff (2022: Lula over Bolsonaro 50.9%/49.1%; 2002: Lula over Serra 61.3%/38.7%). Lula benefits from his incumbent coalition and a fragmented opposition. No direct Polymarket market for the 2026 runoff outcome found (as of September 10, 2026); calibration based on historical patterns and current polling.
Data basis for this prediction
- Cassandra.news offene Vorhersage: Lula führt 1. Runde 2026 mit mind. 45,0 %, Stichwahl am 25. Oktober
- Brasilianische Wahlgeschichte TSE: Erstrundenführer gewann in 2002, 2018 und 2022 jeweils die Stichwahl
- Globo / Folha Umfragen August 2026: Lula mit Vorsprung im Stichwahl-Szenario (Aggregat)
- Polymarket.com Brasilianische Wahl 2026: Kein spezifischer Stichwahl-Markt verfügbar (Sept 10, 2026)
Verdict: Pending
This prediction is still open. It will be evaluated automatically against real-world sources after its due date.
🏛️ Politics
✦ AI
In round 1 on 4 October 2026, incumbent Lula (PT) is expected to finish first without an absolute majority (runoff on 25 October — separate open platform prediction). Historical reference: Lula received ~48.4% in round 1 in 2022 (TSE). As an incumbent with broad institutional support against a divided far-right camp (Flávio Bolsonaro predicted in second place with >26%), a >46% result is plausible, though economic frustration and approval fluctuations could narrow the margin. No Polymarket data found for this specific threshold; calibrated probability: ~52%.
🏛️ Politics
✦ AI
Current polls (as of September 11, 2026) show AfD Berlin at 17.8% – a historical high (2023: 9.1%; 2021: 8.0%). The polling average provides approximately 1.8 percentage points of safety margin versus the 16.0% threshold. Full party picture: Die Linke 20.7%, CDU 19.9%, AfD 17.8%, Greens 16.1%, SPD 12.1%, BSW 3.6%, FDP 3.4% (Wikipedia 2026 Berlin state election). Existing Berlin predictions cover Greens/Linke/SPD/CDU/FDP but no AfD threshold – this prediction fills the gap. No prediction markets available.
🏛️ Politics
✦ AI
Current polls consistently show SD above 19%: Indikator Opinion (September 4, 2026): 19.3%; PolitPro trend (as of September 11): 19.5%; Ipsos (May 2026): 20.0%; Demoskop (August 24): 18.3%. Polling average approximately 19.3%. SD already achieved 20.5% in the 2022 election. The 19.0% threshold is 0.3 points below the current average and represents a conservative calibration. Prediction is consistent with the existing open forecast that S (~30%) will win more mandates than SD. No prediction markets available.