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Will Donald Trump win the 2028 Republican presidential nomination?

1.9%
Consensus Probability (Model A — Inverse-Variance Log-Odds)
3 platforms · 0pp spread · $8.1M

Across 3 prediction market platforms, "Will Donald Trump win the 2028 Republican presidential nomination?" has a consensus probability of 1.9%. Manifold: 2.1%, Polymarket: 1.8%, Predictit: 4.0%. Consensus via geometric mean of odds (Satopaa et al., 2014), validated by IARPA ACE tournament.

Platform Comparison — white line = consensus
Manifold
View →
2%
488 traders
Polymarket
View →
2%
$8.1M
Predictit
View →
4%
$4K
Probability Over Time
All 4 Consensus Models
Market Details
Manifold
Updated 5h ago
Volume
Liquidity
Bid / Ask
— / —
Spread
Opened
Apr 2026
Resolves
Sep 2028
Polymarket
Updated 12d ago
Volume
$8.1M
Liquidity
$262K
Bid / Ask
1.8% / 1.9%
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.…
Predictit
Updated 14d ago
Volume
$4K
Liquidity
Bid / Ask
— / —
Spread
Opened
Apr 2026
Resolves

About This Consensus

Computed from 3 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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