Resolution criteria on PolyGram: This market will resolve to "Yes" if Donald Trump publicly endorses, or announces that he will vote for, JD Vance for the 2028 United States presidential election or the Republican primary for that election, by December 31, 2026, 11:59 PM ET. Otherwise this market will resolve to "No". If Donald Trump announces that he will vote for another candidate or endorses another candidate for the 2028 United States presidential election or the Republican primary for that election, this market will immediately resolve to "No". The resolution source for this market will be official information from Donald Trump or one of his representatives, or a consensus of credible reporting of Trump's endorsement.
PolyGram is an on-chain prediction market where you trade YES or NO outcome shares with real USDC on Polygon. For this market, buy YES if you believe the event will happen, or NO if you think it won't. Your maximum loss is your stake — winning shares pay $1.00 each at resolution. Unlike sportsbooks, there is no house edge: prices are set by supply and demand from other traders and reflect the crowd's real-time probability.
Market outcomes
| Will Trump endorse JD Vance for president before 2027? | 17% YES | 83% NO |
The question centres on whether Donald Trump will publicly endorse JD Vance for the 2028 presidential race before the end of 2026. Vance, currently serving as Vice President-elect under Trump following the 2024 election, would be a natural successor candidate, yet Trump has historically maintained flexibility in endorsement timing and has shown willingness to back alternative candidates when political circumstances shift. The 18% implied probability on Polymarket's order book reflects substantial scepticism about an early endorsement, suggesting traders expect Trump to either delay a formal backing or potentially support a different Republican contender.
Trump's endorsement patterns in previous cycles offer limited direct precedent. In 2016, Trump secured the nomination without a sitting president's backing. In 2020, as the incumbent, Trump's endorsement carried different weight and timing dynamics. The current scenario—a sitting president with a vice president seeking succession—resembles historical transitions more closely, though Trump's unpredictable public statements and tendency to withhold commitments complicate prediction. The low probability reflects uncertainty about whether Trump will formally endorse anyone before 2027, rather than confidence he will back an alternative.
Key catalysts include Trump's public statements regarding 2028 candidates, any formal campaign announcements by Vance or competing Republicans, and Trump's own political positioning in 2025 and 2026. Media coverage of internal Republican dynamics and polling data showing Vance's viability will likely influence trader sentiment. The resolution hinges on explicit public endorsement language; implicit support or speculation will not trigger settlement.
Resolution is handled by the UMA optimistic oracle on Polygon. A proposer submits the outcome, a two-hour dispute window opens, and if no one stakes a counter-claim the payout is final. Contested outcomes escalate to UMA token-holder voting. Payouts clear in USDC to the winning side.
The mechanics for trading "Will Trump endorse JD Vance for president before 2027?" are the same as any other PolyGram event contract. Each YES share resolves to $1 if the event happens, or $0 if it doesn't. The current price between 0¢ and 100¢ is the market's probability estimate, set live by the order book.
$55K in lifetime turnover and $10K of resting liquidity puts this market in the above the median by volume for vance contracts on PolyGram. Order-book depth is modest — expect a couple of cents of slippage on $1k+ trades.
The market has been open for 5 months — the price has had time to stabilise as new information arrived.
Higher-volume markets tend to have tighter spreads and faster price discovery — meaning the displayed YES/NO percentages are more likely to reflect the true crowd-implied probability rather than a single trader's directional view.
As of today, traders on Polymarket price this outcome at 17%. The number updates continuously as the order book clears. PolyGram mirrors the same live odds with locale-aware formatting and USDC settlement.
Resolution is handled by the UMA optimistic oracle on Polygon. A proposer submits the outcome, a 2-hour dispute window opens, and if uncontested the payout is final. Contested outcomes escalate to UMA token holders.
This prediction market is scheduled to close on 31 December 2026. After the resolving event occurs, settlement typically clears within 24 hours once the UMA optimistic oracle confirms the outcome. All payouts are in USDC on the Polygon network.
To trade on this prediction market, create a free PolyGram account at polygram.ink, deposit USDC via Polygon, and place a YES or NO order on the outcome you believe in. You can learn more on our how-it-works page. Your maximum loss is limited to your stake — there is no leverage or margin.
When the outcome is determined, winning YES shares pay out $1.00 each in USDC, while losing shares pay $0. Settlement is handled by the UMA optimistic oracle on Polygon — a proposer submits the result, a two-hour dispute window opens, and if uncontested, payouts are distributed automatically. You can withdraw your winnings to any Polygon wallet.
Prediction-market positions can lose 100% of staked capital. Outcomes are uncertain by definition — historical accuracy of crowd-implied probabilities is high in aggregate but not for any single market. PolyGram does not provide investment advice. Trade only with capital you can afford to lose.
Regulatory status varies by jurisdiction. Germany, the United States, and most EU countries treat Polymarket-style event contracts under one of three frameworks: financial derivative, gambling product, or unregulated novel asset. Consult local counsel before trading.
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