Trade: How many Republican House Incumbents will not win their Primary?

Name: How many Republican House Incumbents will not win their Primary? — Prediction Market
Brand: PolyGram
Availability: InStock

Opened 14 January 2026 · 1 comments

Resolution criteria on PolyGram: The 2026 midterm elections are scheduled to be held on November 3, 2026, with congressional primaries running from March through September. This market will resolve according to the number of Republican House incumbents who do not win their nominating election to move on to the general election as a result of the 2026 midterm primary elections. An incumbent will be considered not to have won their election if they are not declared the winner of the election they sought, including if they withdraw, suspend, or otherwise leave the race at any point after officially registering as a candidate, regardless of the reason.

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.

Liquidity: $800
Total Volume: $41K
24h Volume: —
Open Interest: $22K

Trade this market on PolyGram →

Market outcomes

<3	39% YES	61% NO
7-9	43% YES	57% NO
10-12	2% YES	98% NO
>15	24% YES	76% NO
4-6	38% YES	62% NO
13-15	0% YES	100% NO

Market context

The 2026 midterm cycle will test Republican House incumbents through primary contests running March to September, with the general election on 3 November. The market resolves based on how many sitting Republican representatives fail to secure their party's nomination, including those who withdraw after officially registering. The 40% implied probability on Polymarket's order book reflects genuine uncertainty about primary dynamics two years out, when candidate recruitment, redistricting effects, and internal party dynamics remain partially unformed.

Historical precedent offers limited guidance for predicting primary incumbent defeats. In 2022, only four Republican House incumbents lost primaries nationally, representing roughly 1% of the caucus. The 2020 cycle saw three Republican incumbent primary losses. These low rates reflect structural advantages of incumbency—name recognition, fundraising capacity, and establishment backing—though they vary significantly by state and district competitiveness. The current probability suggests traders expect notably higher turnover than recent cycles, possibly reflecting anticipated retirements, redistricting consequences, or elevated intra-party conflict.

Key catalysts will emerge as the cycle develops. Announcement windows for candidate entry typically accelerate in late 2025 and early 2026, revealing which seats face genuine primary contests versus coronations. Redistricting outcomes in states like Texas and Florida will clarify which districts become more or less competitive. Party leadership decisions on endorsements and resource allocation—particularly regarding Trump-aligned versus establishment candidates—will shape incumbent vulnerability. FEC filings and polling data from spring 2026 onwards will provide concrete signals about competitive primary fields.

Wikipedia Context

Maine Republican Party
The Maine Republican Party is an affiliate of the United States Republican Party in Maine. It was founded in Strong, Maine, on August 7, 1854. The party currently does not control the governor's office or either chamber of the Maine Legislature, nor either of Maine's two U.S. House. The only federal elected office that the party controls is one of Maine's tw
Factions in the Republican Party (United States)
The Republican Party in the United States includes several factions, or wings. During the 19th century, Republican factions included the Half-Breeds, who supported civil service reform; the Radical Republicans, who advocated the immediate and total abolition of slavery, and later advocated civil rights for freedmen during the Reconstruction era; and the St
MAGA movement
The Make America Great Again (MAGA) movement is an American political movement that began with Donald Trump's announcement initiating a campaign in the 2016 United States presidential election. The movement is closely aligned with Trumpism, a set of ideologies and beliefs surrounding Trump. Due to the alignment with Trumpism, the movement commonly advocates
2016 United States presidential election in Maine
The 2016 United States presidential election in Maine was held on Tuesday, November 8, 2016, as part of the 2016 United States presidential election in which all 50 states plus the District of Columbia participated. Maine voters chose electors to represent them in the Electoral College via a popular vote, pitting the Republican Party's nominee, businessman,

How this market resolves

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.

How to trade this market step by step

The mechanics for trading "How many Republican House Incumbents will not win their Primary?" 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.

Sign in on polygram.ink with your email — no full KYC under $1,500 lifetime trading volume.
Deposit USDC on Polygon (lowest fees, ~$0.01 per transaction) or Ethereum. Funds credit after 12 confirmations.
Pick a side. Buy YES if you believe the event will happen; buy NO if you think it won't. The current YES price reflects the market's collective probability.
Size your position. If you stake 100 USDC at 50% YES, you'll receive shares that pay $200 if YES resolves true — a 100% gross return. If NO resolves, your shares are worth $0.
Set risk controls (optional). Stop-loss, take-profit, and limit-order types all supported. Use the trade ticket's slippage box to cap your maximum entry price.
Wait for resolution. When the event resolves on-chain via the UMA optimistic oracle, the winning side settles to 100¢ automatically and USDC hits your balance within seconds. Withdrawable to any wallet you control.

How active is this market?

$41K in lifetime turnover and $800 of resting liquidity puts this market in the around the median by volume for us presidential election 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 4 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.

Key terms

YES / NO share: A binary outcome token that pays $1.00 if the underlying claim resolves true (YES) or false (NO), and $0 otherwise. The market price between 0¢ and 100¢ is the implied probability.
CLOB: Central limit order book. The matching engine that pairs YES buyers with NO buyers (effectively the same trade). Polymarket's CLOB on Polygon executes trades on-chain via the conditional-tokens framework.
Liquidity: USDC capital sitting in resting limit orders inside the order book. Deeper liquidity means smaller slippage on large trades and a tighter bid-ask spread.
UMA optimistic oracle: The on-chain dispute system that settles each Polymarket market. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution.
Slippage: The difference between the displayed mid-price and your fill price. Affects market orders most; limit orders avoid slippage but may take time to fill.
Conditional token: ERC-1155 outcome share issued by Gnosis Conditional Tokens on Polygon. The token type that resolves to $1.00 or $0.00 at settlement.

See the full prediction-market glossary →

Frequently asked questions

How does this market resolve?

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.

How can I trade on "How many Republican House Incumbents will not win their Primary? "?

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.

What happens when the market resolves?

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.

Risk and regulatory note

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.

View live odds & trade →

Related prediction markets

Explore more prediction market odds and trading opportunities on PolyGram: