Republican Presidential Nominee 2028

Platform comparison

Active sub-markets

Market context

The Republican Party will select its 2028 presidential nominee at its national convention, scheduled for mid-July 2028. This market resolves affirmatively only if the specified individual secures and formally accepts the party's nomination, regardless of their subsequent electoral performance or any mid-campaign replacement. The 2% implied probability reflects either a candidate with minimal current backing or one facing substantial structural headwinds within the party apparatus.

Historical precedent suggests nomination probabilities shift dramatically between Iowa caucuses (early February 2028) and convention floor votes. In 2016, Donald Trump entered Iowa at 25% in aggregated polling yet secured the nomination; conversely, establishment-favoured candidates have collapsed from frontrunner status within weeks. The 2024 cycle demonstrated how rapidly consensus can crystallise once early contests conclude. For a candidate currently priced at 2%, meaningful movement typically requires either a surprise early-state performance or a consolidation event where higher-probability rivals exit the race and transfer support.

Traders should monitor Federal Election Commission filings and state-level campaign infrastructure announcements through Q1 2028, as these signal genuine candidacy depth. The Iowa caucuses on 3 February 2028 and New Hampshire primary on 10 February serve as hard catalysts; a candidate must demonstrate viability by placing competitively in at least one early state to sustain momentum toward the convention. Conditional order logic—triggering positions if a candidate reaches specific delegate thresholds or if rival nominees withdraw—offers a programmatic approach to managing the extended timeline and low base rate.

Methodology

We track Republican Presidential Nominee 2028 on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Is this market available outside the US?

Polymarket Bot UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.