Despite a late poll that suggested a tight race, Sen. Marsha Blackburn won Tennessee’s Republican nomination for governor Thursday night, delivering the decisive victory that Kalshi and Polymarket had been signaling.
The final stretch of polling had suggested a much tighter contest with Rep. John Rose and State Rep. Monty Fritts, but Blackburn carried the primary by roughly 10.5 points over Rose and avoided the kind of late surprise traders had reason to worry about after other 2026 governor primaries. The clear prediction markets call contrasts with the Michigan Democratic Senate primary earlier this week, where Abdul El-Sayed eked out a tight victory rather than the runaway suggested by traders and polls.
Blackburn, now the first female GOP governor nominee, heads toward November as a heavy favorite to win the general election against Democrat Jerri Green. Blackburn won reelection to the Senate in 2024, and was also the first woman Senator from the Volunteer State.
Markets beat the late polls
The race became an interesting test of whether markets were too confident. A late Nashville Banner poll had Blackburn at 34.5%, Rose at 31%, and Fritts at 25.6%. Those margins were narrow enough to make a runaway win look tough.
But the actual vote gave Blackburn 43.4%, compared with Rose’s 32.9% and Fritts’ 23.5%, as reported results approached 90%.
Kalshi’s 95.5% probability and Polymarket’s 96% probability looked aggressive heading into Thursday, but the outcome showed traders were reading the state’s broader political structure and Blackburn’s built-in advantages more accurately than the final polling noise.
Blackburn entered the race early, dominated fundraising, drew major in-state endorsements, and maintained front-runner status even without a President Donald Trump endorsement or participation in debates with Rose and Fritts.
An easy November
The primary was the real election for all practical purposes. Blackburn will face Memphis City Council member Green, who won the Democratic nomination, but Tennessee has been dominated by Republicans in statewide elections for years, and the GOP has held the governor’s office since 2011.
That makes November a nonstarter for traders compared with Thursday’s primary.
Blackburn is now the overwhelming favorite to succeed term-limited Gov. Bill Lee and become Tennessee’s first female governor, leaving the only real question as whether the final result looks as lopsided as the prediction markets expect.
