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🏛️ Politics · Next Week

Berlin state election (20 September 2026): SPD receives less than 10.0% of the vote

Miss ✦ AI-generated prediction Published on 15. September 2026 · Predicted for 20. September 2026 · Based on: Ongoing Event
Probability
57%

Polymarket prices the probability of the Berlin SPD falling below 10% at 57% (as of 15 September 2026, ~$35K in volume). Current polls place the SPD at 10–12%; Forschungsgruppe Wahlen (ZDF, 7–10 September) measured exactly 10%, meaning a slip into single digits on election day is realistic. The SPD is suffering from the federal coalition collapse and the rise of Die Linke as Berlin's new mass party (Polymarket winner-market favourite at 64%). For context: the Berlin SPD received 21.4% in 2021 and 18.4% in 2023 — sub-10% would be a historic collapse. This prediction is deliberately more stringent than the already-open 'SPD under 14%' forecast.

Data basis for this prediction
  • Polymarket Berlin Abgeordnetenhauswahl — SPD vote share < 10 %: 57 % (15. September 2026)
  • Forschungsgruppe Wahlen (ZDF) Berlin, 7.–10. September 2026: SPD 10 %
  • Dawum.de gewichteter Schnitt Berlin, 14. September 2026: SPD 11,6 % (INSA 12 %, Infratest 12 %)
  • Polymarket Berlin Gesamtsiegerin: Die Linke 64 %, CDU 28 %, AfD 8,9 % (15. September 2026)
Verdict: Miss
Die SPD erzielte bei der Abgeordnetenhauswahl Berlin am 20. September 2026 exakt 12,1 % der Zweitstimmen (220.939 Stimmen, 22 Mandate) – damit klar oberhalb der vorhergesagten Schwelle von unter 10,0 %. Obwohl das Ergebnis ein historisches Debakel für die Berliner SPD darstellt (2021: 21,4 %, 2023: 18,4 %), blieb der Einstellige-Bereich verfehlt. Die Partei landete auf Platz 5 hinter Die Linke (25,7 %), CDU (18,8 %), AfD (16,3 %) und Grüne (14,3 %). Quellen: wahlen-berlin.de (amtliches Ergebnis), Wikipedia '2026 Berlin state election', politpro.eu.
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