Wisconsin Governor Poll Shows a Toss-Up, Kalshi Gives Crowley a 79% Probability

The Wisconsin governor’s race looks like a coin flip in the latest poll, but prediction markets see something much closer to a Democratic hold.

Milwaukee County Executive David Crowley leads Republican Rep. Tom Tiffany 46% to 45% in a Marquette University Law School survey, with 9% undecided. The one-point gap falls comfortably within the poll’s 4.3-point margin of error.

Yet Crowley is trading at 79% on Kalshi, where $1.4 million has changed hands, and 81% on Polymarket, with just over $700,000 in volume.

That is a substantial disagreement heading into the 2026 midterm elections. Democrats chose Crowley over progressive state Rep. Francesca Hong in a razor-close primary, backing the candidate many party leaders believed was better positioned to win statewide. The markets appear confident in that choice. The latest poll offers considerably less reassurance.

A one-point Wisconsin governor race

The Marquette survey, conducted Sept. 16-23 among 843 registered Wisconsin voters, puts neither candidate near a majority. With nearly one in 10 respondents undecided, the race remains open to late movement.

Wisconsin is familiar territory for that kind of uncertainty. President Donald Trump carried the state in 2024 by less than a percentage point, while Democratic Gov. Tony Evers has won two terms. Evers’ decision not to seek reelection created an open-seat contest without an incumbent on the ballot.

The market percentages measure something different from polling support: traders’ assessment of each candidate’s chance of winning, rather than the share of voters currently backing them. Even so, a near-tie alongside roughly four-in-five Democratic odds is a meaningful gap.

Neither Kalshi nor Polymarket is pricing Tiffany out entirely. But both suggest traders expect Crowley to emerge ahead despite the close public survey.

Crowley beats the progressive wave

Crowley’s nomination was anything but inevitable.

He briefly left the race in July, then returned with Evers’ endorsement. On Aug. 11, he narrowly defeated Hong, who prediction markets favored as a near lock, a democratic socialist whose campaign sought to build on progressive victories elsewhere in the country. Crowley received about 39.8% of the primary vote, while Hong received 39.3%.

The result interrupted the progressive momentum that had helped Abdul El-Sayed win Michigan’s Democratic Senate nomination a week earlier. Crowley instead campaigned as the Democrat best positioned to defeat Tiffany in a closely divided state.

A former state legislator and the Milwaukee County executive, Crowley would become Wisconsin’s first Black governor if elected. His general election task is broader than winning over moderates. Hong’s nearly equal primary vote shows how much of the Democratic coalition he also needs to consolidate.

The primary proved Crowley could outperform expectations. It did not settle whether Wisconsin voters will choose him over a Republican in November.

Tiffany’s Trump balancing act

Tiffany, who represents Wisconsin’s 7th Congressional District, won the Republican nomination with Trump’s endorsement. That gives him a clear connection to the president in a state Trump carried, but also ties him to an administration facing economic concerns and an unpopular war in Iran.

Tiffany has called for the fighting to end, saying it is time to return attention to problems at home. Asked why he had not supported House war-powers resolutions despite urging an exit, he said the president has the final say.

That is a familiar Republican balancing act this fall: maintain support from Trump-aligned voters while acknowledging frustrations that could move independents.

The close Marquette result suggests Tiffany remains competitive. The markets suggest traders believe the broader environment, or Crowley’s eventual coalition, will still favor Democrats.

A Democratic seat to defend

Unlike the Senate pickup opportunities drawing attention in North Carolina, Ohio and Alaska, Wisconsin’s governor’s race is a defensive assignment for Democrats. They are trying to preserve a governorship Evers currently holds, not take one from Republicans.

A Tiffany victory would turn a Democratic-held executive office Republican in one of the country’s most closely contested states. A Crowley win would validate the argument that led party leaders to rally around him: A less ideological nominee could hold together enough of Wisconsin’s electorate to keep the office.

For now, two prediction markets agree that Crowley is the clear favorite. The latest poll says Tiffany is only a point behind.

Wisconsin has a history of close elections. Traders are betting this one will end with a Democratic win, but the polling has not yet caught up to their confidence.