MI-13 Democratic Primary Winner

Platform comparison

Market context

The Democratic primary for Michigan’s 13th congressional district is a two-candidate race between incumbent Shri Thanedar and state representative Donavan McKinney, with the winner set to become the party’s nominee for the August general election. The current 19% implied probability for a YES-style contract is well below the market setups now quoted elsewhere, where Thanedar and McKinney are treated as the only serious paths after other contenders were disqualified or fell out of the race.[1][4][7]

Historically, this kind of primary should be read as a low-drama nomination market unless there is a late procedural issue, because both the ballot and the public candidate lists have already narrowed to the same two names and Michigan’s 13th is a heavily Democratic Detroit-area seat.[2][11][18] Comparable cases in House primaries tend to reprice quickly once filing disputes, endorsement swings, or turnout models point to a single front-runner; recent coverage has described this contest as Thanedar’s toughest challenge and noted that McKinney has gained momentum as the field shrank.[1][4][6]

For a power-user watching it programmatically, the key inputs are the official candidate list, any Democrat communications on the nomination, and the state/party schedule around 4 August, because resolution hinges on the official nominee rather than a temporary race leader.[2][11] The practical catalysts are binary: new disqualifications, withdrawals, or an official party announcement before the market’s 3 November fallback date, with local reporting and vote-tabulation updates most likely to move pricing ahead of election day.[4][7][16]

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 Kalshi Fees, 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

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 Kalshi Fees. 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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

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.