MI-13 Democratic Primary Winner

Platform comparison

Market context

The Democratic nominee for Michigan’s 13th congressional district will be decided in the August 4 primary, and the market is pricing a split between Donavan McKinney and Shri Thanedar rather than a runaway outcome. Polymarket has McKinney at 81% and Thanedar at 18%, while PredictionEdge shows a similar but slightly more bullish McKinney line at about 84%-85%, and WorldEventTrading is even firmer at 89%; by contrast, the contract’s current crowd-implied 18% for YES on Thanedar leaves him priced as a clear underdog. [2][1][10]

That gap is best read against the district’s recent primary history and the fact that bettors are still reacting to a narrowing race rather than a settled one. The market description makes clear that resolution depends on the official Democratic nominee, with any late replacement irrelevant unless no nominee is announced by 3 November 2026, which means traders are really watching the primary result, not the general-election ballot line. Recent reporting cited by odds sites points to a two-candidate contest that has tightened, which helps explain why Thanedar still has meaningful support even though most platforms now lean to McKinney. [1][2][11]

The main catalysts are the final campaign news flow, official primary scheduling, and any announcement from Michigan Democrats after votes are counted, because the market resolves off consensus official party sources such as democrats.org rather than media projections. The comparison with sportsbook-style lines matters here: where one platform implies Thanedar has roughly a one-in-five chance, the broader prediction-market and analyst cluster puts him closer to the low-to-mid teens, suggesting the market is still discounting his path relative to the cleaner McKinney favourite narrative. [2][1][10]

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 Best Prediction Markets, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

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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.