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Will the Democratic Party control the Senate after the 2026 Midterm elections?

45.8%
Consensus Probability (Model B — Geometric Mean of Odds)
2 platforms · 15pp spread · $892K

Across 2 prediction market platforms, "Will the Democratic Party control the Senate after the 2026 Midterm elections?" has a consensus probability of 45.8%. Polymarket: 53.5%, Manifold: 38.4%. 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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54%
$892K
Manifold
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38%
18 traders
Probability Over Time
All 6 Consensus Models
Market Details
Polymarket
Updated 5h ago
Volume
$892K
Liquidity
$187K
Bid / Ask
53.0% / 54.0%
Spread
1.0%
Opened
Apr 2026
Resolves
Nov 2026
This market will resolve according to the party that controls the Senate following the 2026 U.S. Senate elections scheduled for November 3, 2026. Senate control is defined as having more than half of the voting Senate members, or half of the voting Senate members and the Vice Pr…
Manifold
Updated 5h ago
Volume
Liquidity
Bid / Ask
— / —
Spread
Opened
Apr 2026
Resolves
Dec 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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