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Will J.D. Vance win the 2028 Republican presidential nomination?

41.5%
Consensus Probability (Model B — Geometric Mean of Odds)
2 platforms · 5pp spread · $11.6M

Across 2 prediction market platforms, "Will J.D. Vance win the 2028 Republican presidential nomination?" has a consensus probability of 41.5%. Manifold: 44.1%, Polymarket: 38.9%. Consensus via geometric mean of odds (Satopaa et al., 2014), validated by IARPA ACE tournament.

Platform Comparison — white line = consensus
Manifold
View →
44%
1459 traders
Polymarket
View →
39%
$11.6M
Probability Over Time
All 6 Consensus Models
Market Details
Manifold
Updated 33m ago
Volume
Liquidity
Bid / Ask
— / —
Spread
Opened
Apr 2026
Resolves
Feb 2029
Polymarket
Updated 9h ago
Volume
$11.6M
Liquidity
$301K
Bid / Ask
38.8% / 38.9%
Spread
0.1%
Opened
Apr 2026
Resolves
Nov 2028
This market will resolve to “Yes” if the named individual wins and accepts the 2028 nomination of the Republican Party for U.S. president. Otherwise, this market will resolve to “No”. The resolution source for this market will be a consensus of official Republican Party sources.…

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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