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Which party will hold the majority in the US Senate of the 120th Congress in January 2027? — Republican

37.6%
Consensus Probability (Model A — Inverse-Variance Log-Odds)
2 platforms · 1pp spread · $170K

Across 2 prediction market platforms, "Which party will hold the majority in the US Senate of the 120th Congress in January 2027? — Republican" has a consensus probability of 37.6%. Manifold: 38.0%, Gemini: 37.5%. Consensus via geometric mean of odds (Satopaa et al., 2014), validated by IARPA ACE tournament.

Platform Comparison — white line = consensus
Manifold
View →
38%
20 traders
Gemini
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38%
$170K
Probability Over Time
All 4 Consensus Models
Market Details
Manifold
Updated 7d ago
Volume
—
Liquidity
—
Bid / Ask
— / —
Spread
—
Opened
Apr 2026
Resolves
Jan 2027
Gemini
Updated 18d ago
Volume
$170K
Liquidity
—
Bid / Ask
— / —
Spread
—
Opened
Apr 2026
Resolves
Feb 2027

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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