Swedish Riksdag Election (13 September 2026): Social Democrats (S) win the most seats and become the largest party in the Riksdag (confirmed by Valmyndigheten by 14 September 2026)
Pending
✦ AI-generated prediction
Published on 8. September 2026
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Predicted for 13. September 2026
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Based on: Historical Cycle
The latest PolitPro election trend (6 Sep 2026) shows S at 28.7% in first place — ~9 percentage points ahead of Sverigedemokraterna (19.5%) and 11pp ahead of Moderaterna (17.5%). Seat projection gives S 105 of 349 seats. A second-place party closing a 9pp gap in 5 days would be historically unprecedented. No Polymarket market for the 'largest party' outcome specifically. Distinct from the open prediction 'S > 28.0%': this asks about seat rank, not vote share.
Data basis for this prediction
- PolitPro Election Trend Schweden: S 28,7 %, SD 19,5 %, M 17,5 % (Stand 6.9.2026)
- PolitPro Sitzprojektion: S 105 / SD 72 / M 64 Mandate (Stand 6.9.2026)
- Wikipedia: 2026 Swedish general election – opinion polling
- val.se: 2026 elections – Riksdag (Schwedische Wahlbehörde)
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.