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🏛️ Politics · Next Week

Berlin state election (September 20, 2026): SPD receives less than 12.0% of votes cast (confirmed by Berlin state returning officer or tagesschau.de by September 21, 2026)

Miss ✦ AI-generated prediction Published on 18. September 2026 · Predicted for 20. September 2026 · Based on: Statistical Pattern
Probability
60%

According to dawum.de trend (September 14, 2026), Berlin's SPD stands at 11.6%; a recent INSA poll shows 12.0% — both at or near the 12% threshold. The SPD suffers from the Linke surge (21–23%) and loses both centrist-left voters and core supporters in eastern districts. In the 2023 Berlin state election, SPD still received 18.4%. No Polymarket contract available. Uncertainty: polling error ±2–3 points, latent protest potential for/against the SPD; election-day mobilization unknown. Note: The existing open prediction 'SPD < 14%' is a separate, less strict threshold.

Data basis for this prediction
  • dawum.de Wahltrend Berlin (14.09.2026): SPD 11,6 %, Linke 21,1 %, CDU 20,2 %, AfD 17,7 %, Grüne 15,9 %
  • INSA-Umfrage Berlin September 2026: SPD 12 %, Linke/CDU je 20 %, AfD 18 %, Grüne 16 % (t-online.de)
  • Wahlrecht.de: Berliner Wahlumfragen 2026 – Aggregat September (Stand 18.09.2026)
  • Berlin-Wahl 2023 Ergebnis: SPD 18,4 % (Landeswahlleiter Berlin)
Verdict: Miss
Die SPD erzielte laut übereinstimmenden Quellen (Wikipedia DE/EN zur Wahl zum Abgeordnetenhaus 2026, politpro.eu, KAS-Wahlanalyse) 12,1 % der abgegebenen Stimmen — damit verfehlte sie die Vorhersage-Schwelle von unter 12,0 % um 0,1 Prozentpunkte. Der Polling-Fehler wirkte leicht zugunsten der SPD: Die Umfragen (dawum 11,6 %, INSA 12,0 %) hatten eher zu niedrig gemessen. Die Linke gewann mit 25,7 % tatsächlich sehr stark, drückte die SPD auf Rang 5, reichte aber nicht aus, um die SPD unter die 12 %-Marke zu schieben.
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