Pronóstico: Republican Presidential Nominee 2028

Platform comparison

Active sub-markets

Market context

The real-world event is the early formation of the 2028 Republican presidential primary, where current trader consensus places RFK Jr. at 49% and Vice President J.D. Vance at 33%, leaving any specific outsider at a mere 2% chance of winning and accepting the nomination[1][3]. This low probability mirrors historical precedents where non-frontrunners, such as Ted Cruz in 2016 or Mike DeSantis in 2024, failed to secure the nomination despite early speculation, as the party typically consolidates around the incumbent’s chosen successor or a high-profile populist with a distinct base[1][2]. The market’s 2% figure reflects the structural difficulty of displacing a sitting vice president who already holds institutional endorsements and polling strength, a pattern seen in previous cycles where the vice president emerged as the most apparent successor to the president’s legacy[4].

Traders must watch for immediate catalysts, including RFK Jr.’s national tours and rallies that have built his populist base, alongside any sudden shifts in Vance’s favourability amid broader administration headwinds[1]. Recent polling indicates Marco Rubio is overtaking Vance as the favourite, driven by his prominent role in the March 2026 Iran war, which has intensified speculation of a 2028 run[1][2]. Key dependencies include whether Vance’s mixed favourability worsens due to resurfacing controversies like his "childless cat ladies" remark, or if new endorsements emerge for Rubio, potentially altering the early line-up[1][4]. A recent Washington Post report confirms Vance and Rubio top the early list of contenders, suggesting the market will react sharply to any announcement confirming a formal campaign or a significant drop in Vance’s support[3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

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

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.