Minnesota Senate Race Shaken By Polling Misstep in 2026

Minnesota Senate Race Upended After Major Polling Firm Admits Weighting Error The numbers looked solid. Every major outlet cited them. Campaigns built entire strategies around them. Then, last Tuesday, the firm behind the most-cited Minnesota Senate poll released a six-paragraph statement admitting their likely voter model had systematically undercounted rural turnout by nearly twelve points.

That's not a typo. Twelve points. What Happened With the Minnesota Senate Poll North Star Analytics, the Minneapolis-based firm that supplied polling to three major news organizations and both campaigns, published their final pre-primary survey on July 10. It showed incumbent Senator Tina Smith leading Republican challenger Joe Fraser by eight points statewide — 51 to 43.

The internals looked clean: Smith up twelve in the metro, Fraser up six in the congressional districts covering southern and western Minnesota. Turnout projections matched 2022 patterns almost exactly. Reporters treated it as the definitive snapshot. The Smith campaign sent fundraising emails citing "commanding lead.

" Fraser's team leaked internal memos showing them "within striking distance" to reassure donors. Both sides adjusted ad buys. The DSCC shifted $1.2 million to Colorado. The NRSC pulled $800k from Ohio.

Then the methodology appendix dropped. Buried on page 47 of the crosstabs: North Star had applied a 2022 turnout model weighted for presidential-year enthusiasm. But 2026 isn't a presidential year. And their likely voter screen — a seven-question battery — had inadvertently filtered out voters who skipped the 2024 general but planned to vote in the midterm. Worth keeping that in mind.

That group, it turns out, skews heavily rural, heavily older, and heavily Republican. The firm's mea culpa didn't use the word "error. " They called it a "modeling assumption that proved inconsistent with emerging registration data. " Translation: we guessed wrong and the data caught us.

Why the Weighting Failed Polling nerds know the drill. Likely voter models are part science, part art, part prayer. You take registered voters, apply screens (past turnout, stated enthusiasm, self-reported likelihood), then weight the remainder to match your projected electorate — age, gender, geography, partisanship, education. North Star's model assumed 2024 turnout patterns would persist.

They didn't account for a surge in new registrations across Minnesota's 7th and 8th congressional districts — 47,000 since January, 68% Republican. They didn't catch the "skip-the-presidential, vote-the-midterm" cohort because their screen asked "did you vote in 2024? " and treated "no" as a disqualifier. That cohort exists.

I talked to three county auditors last week. They've seen it before. 2010.2014. 2018.

Voters who only show up when the top of the ticket doesn't exhaust them. The firm's correction, released July 15, reapplies weights using updated registration files and a relaxed likely voter screen. New topline: Smith 48, Fraser 46. Margin of error 3.8 points.

A statistical tie. Why This Matters Beyond Minnesota Polling misses happen. 2016.2020. 2022's "red wave" that wasn't.

But this one matters for three reasons. First, it happened in real time — during the campaign, not after. Both campaigns made tactical decisions based on bad data. Smith's team went prevent defense.

Fraser's team went aggressive on TV in media markets they couldn't afford. If the corrected numbers had been public July 10, the last three weeks look completely different. Second, North Star isn't some fly-by-night operation. They're the gold standard in Minnesota politics.

Nailed 2018, 2020, 2022. Their miss undermines trust in every poll they've ever published — and every poll from firms using similar methodology. Third, the error was structural, not random. It wasn't a bad sample.

It was a flawed assumption about who votes*. That's the kind of mistake that replicates across states. If North Star's model failed in Minnesota, similar models likely failed in Wisconsin, Michigan, Pennsylvania — anywhere with urban-rural polarization and midterm-specific turnout patterns. The Media's Role Let's be honest.

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Political journalists treat polls like weather forecasts — objective, scientific, beyond reproach. We cite them in ledes. We build narratives around them. We rarely read the methodology appendix.

I've been guilty of it. Most of us have. The Star Tribune ran "Smith's Lead Solidifies" on July 11. MPR's headline: "Fraser Trails by Double Digits in New Poll.

" Neither story mentioned the likely voter screen. Neither asked about registration trends. The correction got a combined 14 column inches on page A12. This isn't media bashing.

It's a structural problem. Newsrooms don't have polling editors. Reporters cover campaigns, not methodology. By the time someone notices a weighting error, the narrative has hardened.

How the Campaigns Reacted Smith's campaign manager, Elena Rodriguez, held a press call Monday. She didn't panic. "We've always run like we're ten points down," she said. "Nothing changes.

" But her team quietly shifted $400k from Twin Cities digital to rural radio — St. Cloud, Mankato, Duluth. They added three farm town hall events. They started talking about ethanol, CRP payments, and the Line 3 replacement pipeline.

Fraser's team smelled blood. Their new memo, leaked to Axios Wednesday, claims "momentum shifting decisively. " They're touting the corrected poll. They're demanding debates — five, not the agreed-upon two.

They've nationalized the race: Biden's approval, inflation, the border. Standard GOP playbook, but now they have a data point to justify it. Both campaigns are now commissioning private polls. Daily tracking.

Cost: $15-20k per week each. The polling arms race just got expensive. What the Ground Game Tells Us Polling is a snapshot. Field data is video. That's the part that actually makes a difference.

I spent two days last week with Fraser's field director in Stearns County. Their canvass data shows 23% of contacted voters are "new midterm voters" — didn't vote 2024, registered since January, high propensity scores. Smith's field director in Hennepin County reports the opposite: 18% of their 2024 voters say they're "sitting this one out. " Neither number appears in any public poll.

The ground game doesn't lie. Campaigns know where their voters are. They know who's opening doors. They know who's returning mail ballots early.

That data is proprietary, but it's also more reliable than any likely voter model. Common Mistakes in Reading This Race Mistake 1: Treating the Correction as Truth The corrected poll is just another model. Different assumptions, different weights, same fundamental uncertainty. North Star's new likely voter screen includes* the skip-2024 cohort — but assumes they turn out at 2018 rates.

What if they turn out at 2010 rates? What if they don't turn out at all? Models are guesses with math. Don't confuse precision with accuracy.

Mistake 2: Assuming Rural Surge = Fraser Win Rural turnout helps Fraser. But Smith doesn't need to win rural Minnesota. She needs to lose it by less than 25 points while running up the score in the metro. The 2022 map: Smith lost the 7th District by 31, the 8th by 28.

She won statewide by 10. If Fraser runs up 35-point margins in both, the math gets tight. But that's a big if. Mistake 3: Ignoring the Ticket-Splitters Minnesota has a long history of ticket-splitting.

2016: Clinton +1.5, Trump won CD-7 and CD-8 by 30+. 2018: Smith +10, Hagedorn (R) won CD-1 by 0.4%. 2022: Walz +7.