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Will the Republican Party hold exactly 55 Senate seats after the 2026 midterm elections?

2.0%
Consensus Probability (Model B — Geometric Mean of Odds)
2 platforms · 0pp spread · $392K

Across 2 prediction market platforms, "Will the Republican Party hold exactly 55 Senate seats after the 2026 midterm elections?" has a consensus probability of 2.0%. Polymarket: 1.9%, Predictit: 2.0%. Consensus via geometric mean of odds (Satopaa et al., 2014), validated by IARPA ACE tournament.

Platform Comparison — white line = consensus
Polymarket
View →
2%
$392K
Predictit
View →
2%
Probability Over Time
All 6 Consensus Models
Market Details
Polymarket
Updated 2h ago
Volume
$392K
Liquidity
$17K
Bid / Ask
1.9% / 2.0%
Spread
0.1%
Opened
Apr 2026
Resolves
The 2026 midterm elections are scheduled to be held on November 3, 2026. This market will resolve according to the number of seats held by the Republican Party in the US Senate as a result of the 2026 midterm elections. This market will resolve based on the results of all Senat…
Predictit
Updated 21d ago
Volume
Liquidity
Bid / Ask
— / —
Spread
Opened
Apr 2026
Resolves

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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