🏛️ Politics · Next Week

Berlin State Election (September 20, 2026): SPD wins less than 14.0% of votes cast (confirmed by Berlin Returning Officer or tagesschau.de by September 21, 2026)

Hit ✦ AI-generated prediction Published on 14. September 2026 · Predicted for 20. September 2026 · Based on: Statistical Pattern

Probability

72%

PolitPro's September 13 trend shows Berlin SPD at 12.1% — a historic low. Even accounting for ±3pp polling error, exceeding 14% would require a substantial over-performance. National drag from the 2025 coalition collapse, CDU chancellorship, and Die Linke's strength in Berlin's urban left flank explain the decline. No direct prediction market; calibrated via polls only.

Data basis for this prediction

PolitPro Wahltrend Berlin, 13.09.2026: SPD 12,1 % (politpro.eu)
INSA-Umfrage Berlin September 2026: SPD ca. 12 % (TVP World / INSA)
Berlin.de: über 2,5 Mio. Wahlberechtigte, Wahl 20.09.2026
Wikipedia: 2026 Berlin state election – aktuelle Polling-Übersicht (Stand 14.09.2026)

Verdict: Hit

Die SPD erzielte bei der Abgeordnetenhauswahl Berlin am 20. September 2026 laut übereinstimmenden Quellen (Wikipedia, wahlrecht.de, Tagesspiegel) ca. 12,1 % der Stimmen – damit klar unter der Vorhersageschwelle von 14,0 %. Die Partei landete auf Platz 5 hinter Die Linke (25,7 %), CDU (~18,8 %), AfD (16,3 %) und Grüne (~14,3 %). Der PolitPro-Umfragewert von 12,1 % traf das tatsächliche Ergebnis nahezu exakt; die angenommene Fehlertoleranzreserve von ±2–3 Punkten wurde nicht benötigt. Quellen: Wikipedia 'Wahl zum Abgeordnetenhaus von Berlin 2026', wahlrecht.de, Tagesspiegel Wahlergebnisse 2026.

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