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🏛️ Politics · Next Week

Luiz Inácio Lula da Silva (PT) receives more than 40.0% of valid votes in the 1st round of Brazil's 2026 presidential election

Pending ✦ AI-generated prediction Published on 30. September 2026 · Predicted for 4. October 2026 · Based on: Statistical Pattern
Probability
65%

All current polls (BTG Nexus/Nexus Pesquisas, Sept 28: Lula 42%, F. Bolsonaro 37%; Datafolha: Lula 41%) consistently place Lula above 40%. The AS/COA Poll Tracker shows Lula above 40% in every September survey. This prediction is consistent with existing open Cassandra forecasts ('runoff needed' and 'Bolsonaro >35%'): at Lula 42% + Bolsonaro 37%, neither a majority nor a contradiction arises. A second round on October 25 is near-certain.

Data basis for this prediction
  • BTG Nexus / Nexus Pesquisas, 28. September 2026: Lula 42 %, F. Bolsonaro 37 %
  • AS/COA Brazil 2026 Presidential Poll Tracker — Lula >40 % in allen September-Umfragen
  • US News / Reuters: 'Brazil's Lula widens first-round lead', 28. September 2026
  • Tribunal Superior Eleitoral (TSE): Wahltermine — 1. Runde 4. Oktober 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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Brazil 2026 presidential election (1st round, October 4): Flávio Bolsonaro (PL) receives more than 35.0% of valid votes (confirmed by Tribunal Superior Eleitoral or Reuters by October 5, 2026)

Senator Flávio Bolsonaro (PL) is the leading conservative challenger against 79-year-old incumbent Lula da Silva (PT). Recent polls show Flávio at 33–43%: Datafolha (Sept 22–24): 36%, Quaest/Genial (Sept 24–27): 34%, AtlasIntel/Bloomberg: 43.4%. The three-poll average is ~38%; even the most conservative polls show him at 34–36%. Prediction markets price Flávio as overall election winner: Polymarket ~58–59%, Kalshi ~61% — a clear market consensus on his mobilization advantage heading into the runoff. The >35% threshold sits near the lower end of the polling range, yielding solid probability. A runoff on October 25 is virtually certain as neither candidate polls above 50%.

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