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Will the Republicans win the Montana Senate race in 2026?

78.2%
Consensus Probability (Model B — Geometric Mean of Odds)
2 platforms · 3pp spread · $34K

Across 2 prediction market platforms, "Will the Republicans win the Montana Senate race in 2026?" has a consensus probability of 78.2%. Polymarket: 79.5%, Manifold: 76.8%. 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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80%
$34K
Manifold
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77%
12 traders
Probability Over Time
All 6 Consensus Models
Market Details
Polymarket
Updated 3h ago
Volume
$34K
Liquidity
$10K
Bid / Ask
79.0% / 80.0%
Spread
1.0%
Opened
Apr 2026
Resolves
This market will resolve according to the winner of the 2026 midterm Montana U.S. Senate election, inclusive of any run-offs. A candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democ…
Manifold
Updated 3h ago
Volume
Liquidity
Bid / Ask
— / —
Spread
Opened
Apr 2026
Resolves
Nov 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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