Wisconsin Governor Democratic Primary Margin of Victory

Platform comparison

Market context

Wisconsin's Democratic primary for governor takes place on 11 August 2026, with the margin between the top two finishers now priced at just 1% probability of exceeding a meaningful threshold. The current pricing reflects expectation of a decisive contest rather than a close race, though the field remains fluid with potential candidates still signalling their intentions as of late 2024. Recent developments in state Democratic circles have centred on positioning around economic messaging and abortion rights, issues that typically drive primary turnout in the Badger State.

Historical Wisconsin Democratic primaries show considerable variation in competitiveness. The 2018 gubernatorial primary saw Tony Evers defeat Kelda Roys and Mahoney with a 42-point margin, though that contest featured a less crowded field. Conversely, the 2022 Senate primary between Mandela Barnes and others produced tighter margins in early contests before consolidation. The current 1% probability suggests market participants anticipate either a frontrunner with substantial name recognition or a field that coalesces around one candidate well before August.

Traders should monitor candidate announcements through spring 2025, particularly any high-profile endorsements or funding disclosures that might indicate consolidation. The Democratic Party's state convention in May 2026 traditionally influences primary dynamics, though Wisconsin's open primary rules mean grassroots mobilisation matters considerably. Polling data, when released, will provide the most direct signal of whether the expected decisive margin holds or whether late-breaking developments narrow the field unexpectedly.

Methodology

This page reviews Wisconsin Governor Democratic Primary Margin of Victory across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Today, which mirrors the Polymarket order book at 0% fees.

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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.

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