Sen. Marsha Blackburn goes into Thursday’s Tennessee Republican governor primary as the kind of favorite prediction markets love, even as new polling says the race is tighter than the odds suggest.
Kalshi has her at 96% on about $614,000 in volume and Polymarket at 96% on roughly $73,000. However, the latest surveys show Rep. John Rose and State Rep. Monty Fritts closer than those numbers imply.
It’s a similar pattern seen in other Republican governor primaries this year in states that won’t have a competitive November race.
Markets vs. polls in Tennessee
Blackburn has been the clear frontrunner since she jumped into the race last year, leading every public GOP primary poll and often posting double-digit or even 40-plus-point advantages over Rose.
A new OnMessage/Banner poll, however, has her at just 34.5%, with Rose at 31% and Fritts at 25.6%, plus 9% undecided. That would essentially turn a race that prediction markets see as a coronation into a three-way race where the vote could split and force a runoff. Blackburn, however, pushes back on those numbers.
That gap between market certainty and polling noise looks familiar this week after Michigan, where Abdul El-Sayed still won but less than the 99% prediction markets odds might have implied, and South Carolina’s governor race, where Lt. Gov. Pamela Evette’s high-90s pricing didn’t stop her from losing in the runoff.
Tennessee now fits the same pattern. Traders are treating Blackburn as a shoo-in, but the underlying numbers could imply a messier result.
Trump sits this one out
Unlike South Carolina, there’s no endorsement from President Donald Trump to try to solidify the field. Ahead of the initial primary, he endorsed Evette, only to see her forced into a runoff.
Trump then hedged his bet and also endorsed Attorney General Alan Wilson, who ended up winning the nomination.
Blackburn, Rose, and Fritts have all run as staunch Trump allies, yet Trump decided he wouldn’t endorse anyone, citing loyalty to Rose while also maintaining a long relationship with Blackburn.
That leaves the race to be decided more by Tennessee’s own dynamics than by a national nod.
November is a nonstarter
For traders, the real reason Tennessee doesn’t move the needle is that the state is safely red in November.
Traders favor whoever wins the GOP primary overwhelmingly to beat the Democratic nominee in the fall, and general election polling has consistently shown Republicans with wide leads over likely Democratic challengers.
In other words, the market cares about who wins on Thursday mostly as a question of which Republican will govern Tennessee, not whether the mansion flips.
Blackburn is still the heavy favorite, but the combination of narrowing polls, a multi-candidate field, and recent examples of mispriced “locks” should make traders at least a little cautious about treating Thursday’s primary as already resolved.
