Resolution criteria on PolyGram: The 2026 midterm elections for the US Senate is scheduled to be held on November 3, 2026. This market will resolve to "Yes" if Republicans hold fewer seats in the Senate for any state that Trump won in the 2024 US presidential election as a result of the 2026 midterm elections. Otherwise, this market will resolve to "No". Initial seat counts will be based on the composition of the US Senate as of November 2, 2026, 11:59PM ET. This market's resolution will be solely based on the number of seats held by the Republican Party in the US Senate for any state won by Trump in the 2024 Presidential election.
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 Republicans lose a seat in the US Senate for any state Trump won in 2024? | 85% YES | 15% NO |
The 2026 midterm elections will determine whether Republicans lose Senate representation in any state that Donald Trump won during the 2024 presidential election. Currently, the Polymarket order book implies an 85% probability of at least one Republican seat loss in a Trump state, reflecting expectations that Democrats will gain ground in the chamber. The settlement window closes on 3 November 2026, immediately following election day, with seat counts finalised as of 2 November 2026 at 23:59 ET.
Historical midterm patterns suggest the crowd's high probability reflects structural headwinds for the party holding the presidency. In 2022, Republicans gained Senate seats despite Biden's presidency, but that outcome bucked the typical pattern—the party in power has lost Senate seats in seven of the past nine midterm cycles. The 2026 election occurs in Trump's second term, and second-term midterms have historically been particularly punishing for the incumbent party. Comparable 2018 and 2010 cycles saw significant opposition gains, though the magnitude varies considerably based on seat exposure and regional dynamics.
Traders should monitor early 2026 polling trends in competitive Trump-won states, particularly Arizona, Georgia, Nevada and Pennsylvania, where Republicans hold seats facing potential vulnerability. Candidate announcements and recruitment decisions will clarify the competitive landscape by spring 2026. Economic conditions heading into autumn 2026—inflation, employment figures and consumer confidence—will substantially influence whether the historical midterm penalty materialises. Senate Majority Leader control and legislative achievements or failures during 2025–2026 will shape the national environment in which these state-level races unfold.
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 Republicans lose a seat in the US Senate for any state Trump won in 2024?" are the same as any other PolyGram political 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.
$3K in lifetime turnover and $2K of resting liquidity puts this market in the below the median by volume for politics contracts on PolyGram. Order-book depth is thin — large orders may need to be split across the book or executed as limit orders.
The market has been open for 6 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 85%. 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 3 November 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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