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Will Haley Stevens win the 2026 Michigan Democratic Primary?

13.3%
Consensus Probability (Model B — Geometric Mean of Odds)
2 platforms · 4pp spread · $21K

Across 2 prediction market platforms, "Will Haley Stevens win the 2026 Michigan Democratic Primary?" has a consensus probability of 13.3%. Polymarket: 11.5%, Manifold: 15.4%. Consensus via geometric mean of odds (Satopaa et al., 2014), validated by IARPA ACE tournament.

Platform Comparison — white line = consensus
Polymarket
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12%
$21K
Manifold
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15%
34 traders
Probability Over Time
All 6 Consensus Models
Market Details
Polymarket
Updated 18m ago
Volume
$21K
Liquidity
$12K
Bid / Ask
10.0% / 13.0%
Spread
3.0%
Opened
Apr 2026
Resolves
Aug 2026
This market will resolve according to the winner of the Democratic Primary for United States Senator from Michigan. If no 2026 Michigan Democratic Senate Primary takes place, this market will resolve to "Other". The resolution source for this market will be the first announceme…
Manifold
Updated 13m ago
Volume
Liquidity
Bid / Ask
— / —
Spread
Opened
Apr 2026
Resolves
Aug 2026

About This Consensus

Computed from 2 platforms using geometric mean of odds (Satopaa et al., 2014). This method was validated by the IARPA ACE forecasting tournament as the most accurate probability aggregation technique. Full methodology →

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