Busse at 86% in MT-01 Dem Primary Markets, but Forstag Outraises Him

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Ryan Busse Is Already the Winner of MT-01's Democratic Primary, According to Prediction Markets

Six days before Montana's 1st Congressional District Democratic primary, Ryan Busse has not yet received a single vote. The ballots haven't been counted, the polls haven't closed, and his opponents are still actively campaigning. None of that matters to the prediction markets, which have functionally declared this race over.

Busse sits at 86% implied probability across Kalshi and Polymarket, with Kalshi pricing him at 87% and Polymarket at 84%. Three days ago, he was at 77%. That 9-percentage-point surge in under 72 hours, with no major public catalyst, suggests either private information is flowing into the market or traders are front-running the inevitable conclusion of polling data that already showed Busse with a 15-point lead among likely Democratic primary voters.

An 86% probability six days before resolution is not a prediction. It is a price that implies the only remaining question is whether something catastrophic intervenes. In practical terms, traders are offering 7-to-1 odds against the field. The June 2 primary resolves this market, and the spread between Kalshi and Polymarket is a tight 3 percentage points, indicating broad consensus rather than a platform-specific anomaly.

But if the market is this confident, one number should give traders pause.

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Sam Forstag Outraises Ryan Busse. So Why Is the Market So Sure?

Sam Forstag has raised $449,600, according to FEC filings tracked through March 31. Ryan Busse has raised $530,000 in total but holds just $368,100 in cash on hand, meaning he has already spent roughly $162,000 of his war chest. Forstag's total raised figure, without a corresponding cash-on-hand disclosure at the same granularity, leaves open the possibility that Forstag is sitting on more deployable capital heading into the final sprint.

This matters because MT-01 is an enormous, rural district where Democratic primary turnout is typically low. In races like this, the marginal dollar spent on voter contact, mailers to remote communities in the Flathead Valley, or targeted digital ads in Missoula and Helena can move small but decisive blocks of voters. Russell Cleveland, who has raised $325,900, adds another variable. If Cleveland's spending fragments the anti-Busse vote without consolidating behind Forstag, the fundraising gap becomes irrelevant. If Cleveland drops off and his supporters coalesce, Forstag's financial edge could translate into a real ground-game advantage in the final week.

Historically, fundraising advantages in low-turnout congressional primaries correlate with field operations, and field operations determine who actually shows up on election day. Markets may be discounting this because they are pricing name recognition and polling, not door-knocking capacity.

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What Ryan Busse Has That No Donor Can Write a Check For

The market's confidence rests on factors that don't appear on an FEC filing. Busse is a former firearms industry executive who became a nationally prominent gun reform advocate and author. That profile generates earned media coverage that no amount of Forstag's fundraising can replicate. In an April candidate forum in Butte, Busse drew on his 2024 gubernatorial campaign experience and emphasized universal health coverage, a position designed to consolidate the Democratic base.

The structural backdrop reinforces his position. Republican incumbent Ryan Zinke announced in March 2026 he would not seek re-election, turning MT-01 into an open seat. The DCCC subsequently added the district to its targeted list in February, signaling national Democratic investment. Busse is the candidate best positioned to absorb that institutional support. A Tulchin Research poll of 400 likely Democratic primary voters showed him at 35%, leading his nearest competitor by 15 points. That poll, released in April, is the most recent public survey available, and its margin is large enough to survive significant erosion.

Busse's gubernatorial run in 2024, while unsuccessful, built a statewide voter file and a network of volunteers. That infrastructure carries over. In a primary where turnout may be measured in the tens of thousands rather than hundreds of thousands, a pre-existing operation is worth more than a marginal fundraising advantage.

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The Case Against Busse: What Would Have to Be True for This Market to Miss

For Busse to lose at 86%, several things would need to break simultaneously, but none of them are impossible. First, the Tulchin poll was commissioned by the Busse campaign itself. Internal polls are designed to show the commissioning candidate in the best light. If the true margin is closer to 5 points than 15, the race is competitive with six days of paid media still to deploy.

Second, Forstag's fundraising advantage could matter most in the final week, precisely the period where late-deciding voters in low-turnout primaries are most susceptible to direct contact. Montana's Democratic primary electorate skews toward engaged, locally networked voters in places like Missoula and Bozeman. These voters may respond more to persistent ground-game presence than to Busse's national media profile. A candidate who is a better fit for local Democratic politics than for cable news could outperform in a race where 40,000 total votes might determine the outcome.

Third, the 86% price may reflect a thin market. Without specific volume data, it is worth noting that a congressional primary in Montana is not attracting the same trading interest as a presidential race or a Senate contest. In less liquid markets, prices can overshoot because there are fewer contrarian traders willing to take the other side. The 3-point spread between Kalshi and Polymarket is reassuring but not conclusive.

The honest assessment: Busse is the clear favorite. The polling lead, the name recognition, the institutional positioning, and the campaign infrastructure all point in the same direction. But 86% is aggressive for a race where the leading public poll is two months old, the frontrunner is being outraised, and primary turnout is inherently unpredictable. A price in the mid-to-high 70s would better reflect the remaining uncertainty. At 86%, the market is pricing certainty it does not possess.