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🏛️ Politics · Next Month

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)

Hit ✦ AI-generated prediction Published on 10. September 2026 · Predicted for 25. October 2026 · Based on: Historical Cycle
Probability
65%

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: Hit
Lula gewann die Stichwahl am 25. Oktober 2026 mit 51,79 % (64,26 Mio. Stimmen) gegen Flávio Bolsonaro (48,21 %), bestätigt durch das Tribunal Superior Eleitoral (TSE). Die Kernvorhersage trat ein. Allerdings war die Begründung teilweise ungenau: Lula führte die erste Runde NICHT – Flávio Bolsonaro gewann sie mit 47,03 % zu 45,16 %. Das historische Muster 'Erstrundenführer gewinnt immer die Stichwahl' gilt damit nicht; Lula holte den Rückstand im zweiten Wahlgang auf. Quellen: NPR (npr.org/2026/10/25), CNBC (cnbc.com/2026/10/26), ZDF heute (zdfheute.de).
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Mary Peltola (Democrat) wins the US Senate seat in Alaska against Dan Sullivan (Republican) — US Midterm Elections November 3, 2026 (confirmed by AP or NBC News by November 5, 2026)

Polymarket gives Peltola a 72% win probability (as of November 3, 2026). The Democrat benefits from Alaska's Ranked Choice Voting system, which structurally favors cross-partisan candidates, as well as strong support from the Indigenous population and Alaska Native organizations. The national environment weighs on Sullivan: Polymarket gives Democrats a 72–77% probability of winning the Senate majority and 95% in the House. Early mail-ballot returns show a slight pro-Democratic lean in Alaska. Because Alaska uses ranked choice, a final count is not expected until November 5.

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