Swedish Riksdag Election (13 September 2026): Social Democrats (S) Become the Largest Single Party with the Most Votes of All Parties (confirmed by Valmyndigheten)
Pending
✦ AI-generated prediction
Published on 21. August 2026
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Predicted for 13. September 2026
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Based on: Statistical Pattern
Current polls (August 2026) show the Social Democrats (S) at ~33%; the Moderaterna (M) poll at ~19–21%. The ~12–14 percentage-point gap is structural. The Red-Green opposition bloc leads at 52–55% versus the Tidö governing bloc at 42–46%. Polymarket and Metaculus imply a government change with ~70–75% probability. The existing open prediction reads 'S exceeds 30.0%'; this prediction focuses on the relative ranking (largest single party) – a technically distinct measure that could be true even with a narrow result below 30% if M falls further.
Data basis for this prediction
- Umfragen Schweden August 2026: Socialdemokraterna ~33 %, Moderaterna ~19–21 %, Rot-Grün-Block 52–55 % (Metaculus/Polymarket Research Agent, 21. Aug 2026)
- Polymarket/Metaculus: 'Regierungswechsel Schweden Sep 2026 – ~70–75 % Wahrscheinlichkeit' (Aug 2026)
- Wikipedia: 'Opinion polling for the 2026 Swedish general election – Social Democrats clear lead'
- Valmyndigheten (val.se): Offizielle Wahlbehörde Schweden – Wahltermin 13. September 2026
Verdict: Pending
This prediction is still open. It will be evaluated automatically against real-world sources after its due date.
🏛️ Politics
✦ AI
The SPD received exactly 18.4% in the 2023 Berlin state election and has since been in opposition. Current polls (August/September 2026) put the SPD at 19–22%, making a result above 18.0% likely. Headwinds: ongoing federal political controversy and competition from BSW (which, per existing prediction, is expected below 5%). The 18.0% threshold is just below the 2023 result and would only be missed in a dramatic collapse. No Polymarket market; Metaculus aggregate implies ~65% for SPD above 18%.
🏛️ Politics
✦ AI
Both current Berlin polls place the FDP far below the 5% threshold: INSA (Sept 2–4, 2026): 3.0%; Infratest dimap (Aug 27–31, 2026): FDP below the statistical detectable threshold. The Berlin FDP has not reached the 5% mark in any poll since spring 2026. Clearing the hurdle would require a simultaneous systematic error of 2+ points from both institutes — historically near-unprecedented. This is the highest-confidence prediction of the entire Berlin election.
🏛️ Politics
✦ AI
Current polls show Liberalerna well below the 4% threshold: Indikator Opinion (fieldwork to September 4, 2026): 2.2%; PolitPro election trend (as of September 9, 2026): 2.7%. Neither institute identifies meaningful upward momentum. The party was part of the Tidö coalition but suffered from its image problems. Even with maximum systematic polling error of +1.5 points, Liberalerna would remain below 4.2%. Failing to enter the Riksdag would cost the governing coalition its parliamentary majority.