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

44.4%
Consensus Probability (Model A — Inverse-Variance Log-Odds)
2 platforms · 8pp spread · $1.3M

Across 2 prediction market platforms, "Will the Democratic Party control the Senate after the 2026 Midterm elections?" has a consensus probability of 44.4%. Polymarket: 46.5%, Manifold: 38.4%. Consensus via geometric mean of odds (Satopaa et al., 2014), validated by IARPA ACE tournament.

Platform Comparison — white line = consensus
Polymarket
View →
46%
$1.3M
Manifold
View →
38%
18 traders
Probability Over Time
All 4 Consensus Models
Market Details
Polymarket
Updated 27d ago
Volume
$1.3M
Liquidity
$143K
Bid / Ask
46.0% / 47.0%
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 48d 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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