Minnesota Senate Polls Show a Toss-Up, Kalshi Gives Flanagan an 86% Chance.

The Minnesota Senate race looks competitive in the polls, but prediction markets don't buy it.

Democrat Lt. Gov. Peggy Flanagan leads Republican Michele Tafoya 46% to 45% in a new InsiderAdvantage survey, a one-point advantage well within its roughly three-point margin of error. A separate KSTP/SurveyUSA poll found the candidates tied at 42%, with 12% undecided.

Yet Flanagan is trading at 86% to win on Kalshi, where $1.6 million has changed hands, and 89% on Polymarket, with $199,150 in volume. It is one of the sharpest poll-versus-market contrasts among the midterm 2026 Senate races. Surveys suggest an unexpectedly close contest, while traders still see a comfortable Democratic hold.

That disagreement matters beyond Minnesota. The candidates are competing for retiring Democratic Sen. Tina Smith’s seat. A Republican pickup here would make Democrats’ already difficult path to a Senate majority substantially harder.

Tight polls, confident markets

The InsiderAdvantage survey questioned 1,200 likely voters Sept. 28-29. Its result is not the only sign of a close race. Earlier September polls gave Flanagan a one-point advantage in a co/efficient survey and a four-point lead in a Quantus Insights poll.

But traders are not alone in questioning whether those numbers capture the eventual result.

Cook Political Report rates Minnesota “likely Democratic” and has expressed skepticism about public polls showing a near tie. Its assessment points partly to Flanagan only recently beginning to spend after an expensive Democratic primary.

Flanagan has her own reason to distrust a close polling snapshot. A SurveyUSA poll before the August primary showed Rep. Angie Craig narrowly ahead. Flanagan ultimately defeated Craig 59% to 39%. That primary polling miss doesn't mean general election surveys are wrong, but it helps explain why the campaign is resisting the toss-up narrative.

The percentages measure different things. A 46% polling share estimates current voter support, while an 86% market price reflects traders’ assessment of her chance of winning. Still, a string of near-ties alongside an overwhelming market favorite is a meaningful disagreement, not simply two ways of expressing the same forecast.

Fraud versus the Trump factor

Tafoya, the former NBC Sunday Night Football sideline reporter making her first run for office, has built her campaign around fraud in Minnesota’s social-service programs. She argues that Flanagan cannot separate herself from failures during the administration in which she has served as lieutenant governor since 2019.

The distinction between political responsibility and personal knowledge is important. MinnPost reported that Tafoya has not provided evidence Flanagan knew about the schemes while they occurred. Flanagan says fraud enforcement was not her assigned responsibility and has condemned the theft of public money.

That has not stopped the issue from becoming a potential Republican opening. Local political analysts told MinnPost that the fraud message is hurting Democrats and could motivate GOP turnout in a state where Republicans have not won statewide office since 2006.

Flanagan’s counterargument centers on President Donald Trump. She has tied Tafoya to the president’s policies on immigration, tariffs and the Iran war, arguing that voters should reject a Republican who would support his agenda in Washington. Tafoya has described herself as an independent thinker and criticized the handling of federal immigration operations in Minnesota, while still backing other central Trump policies.

A progressive general election test

Flanagan’s primary victory was a clear win for the Democratic Party’s progressive wing over Craig’s more moderate candidacy. A former state legislator and children’s advocate, Flanagan supports Medicare for All and has been critical of Israel’s government and the Iran war.

November will test whether the coalition that delivered her decisive primary win can carry a statewide general election. The close polls give Republicans an opportunity to question her appeal beyond Democratic primary voters. The markets suggest traders expect Minnesota’s Democratic advantages to hold.

For a supposedly emerging battleground, the campaign has been unusually quiet. MPR reported relatively few publicized events, policy rollouts or press conferences, with national outside spending less prominent than in better-known Senate contests. Both candidates have relied substantially on smaller events, advertising and social media.

That could change if the tight polling persists. A scheduled Oct. 16 MPR debate will also give voters a direct comparison before the Nov. 3 election.

A costly surprise for Democrats

Democrats need a net gain of four seats to retake the Senate. Their pickup opportunities are expanding in Republican-held states, but that strategy depends on protecting the seats they already have.

Minnesota was not supposed to become another expensive defensive assignment. However, indications are still pointing to a relatively light spend.

But a Tafoya victory would mean Democrats need five Republican-held pickups rather than four, assuming they lose no other seats. Even a credible Republican threat could divert money and attention from opportunities elsewhere. Local analysts told MinnPost that additional national spending in Minnesota would be particularly unwelcome for Democrats trying to broaden their offensive map.

For Republicans facing difficult races in their own strongholds, Minnesota offers the possibility of an unexpected offset. For Democrats, it reminds them that favorable national conditions do not eliminate local vulnerabilities.

The polls are putting that possibility on the table. Prediction markets are still betting it stays there.