Democratic Presidential Nominee 2028

Platform comparison

Market context

The real-world event at the heart of this market is the Democratic Party’s selection of its 2028 presidential nominee, a process that will conclude before the US general election on 7 November 2028. A YES share pays out if the named individual wins and accepts that nomination; a NO share pays out if they do not. In this specific market, the current crowd-implied probability sits at 21% for YES, reflecting uncertainty about whether the individual will secure the party’s backing.

Historically, early nomination probabilities often shift dramatically as candidates release autobiographies, launch book tours, or gain high-profile endorsements. For instance, Gavin Newsom’s visibility rose after his autobiography and tour, leading *The Washington Post* and *The Philadelphia Inquirer* to label him a potential candidate, while Alexandria Ocasio-Cortez was flagged by *Axios* in September 2025 as positioning for a 2028 run [1]. Similarly, Shapiro entered the top-candidate list in May 2026 following similar moves [1]. These cases show how a 21% probability can be a starting point rather than a final verdict.

Traders should monitor upcoming announcements, campaign schedules, and dependencies such as primary dates or key state endorsements. Recent coverage in *Politico* (June 2026) notes that the 2028 Democratic ticket may already be taking shape, with figures like Jon Ossoff and Raphael Warnock gaining traction [5]. Watch for official campaign filings, media interviews, and shifts in polling data from sources like *The Guardian*, which currently ranks Ocasio-Cortez among top contenders alongside Harris and Newsom [1]. These catalysts will determine whether the 21% probability rises or falls.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Prediction Market UK, 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?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Market UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.