Democratic Presidential Nominee 2028

Platform comparison

Market context

The Democratic Party will select its 2028 presidential nominee at the Democratic National Convention, scheduled for August 2028. The individual named in this market resolves to "Yes" only if they secure the party's formal nomination and accept it. A 20% implied probability reflects meaningful but minority backing for this candidate relative to the field of potential contenders.

Historical precedent suggests nomination contests remain fluid until the convention itself. In 2020, Joe Biden entered Super Tuesday as a secondary contender before consolidating support; in 2016, Hillary Clinton faced sustained pressure from Bernie Sanders through June. Replacement scenarios—such as a nominee withdrawing post-nomination—do not alter this market's resolution, making it distinct from general election viability contracts. The fixed settlement window (7 November 2028) captures only the nomination outcome, not November performance, which simplifies conditional logic for automated trading strategies.

Traders should monitor formal candidate announcements (typically autumn 2027 onwards), state primary results beginning January 2028, and delegate-count reporting through the summer convention period. The Democratic National Committee publishes official delegate allocations and nomination rules; tracking FEC filings and party endorsement patterns provides early signal on consolidation dynamics. For programmatic approaches, integrating convention livestream data and official DNC statements as resolution inputs minimises ambiguity. The 20% current probability suggests the market views this candidate as a credible but non-frontrunner option, with substantial probability mass distributed across alternative nominees.

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 Polymarket Bot UK, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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'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.

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.