The Louisiana Republican Senate runoff is turning into a much tighter fight than the prediction markets suggest, even as traders continue to treat it like a safe path for U.S. Rep. Julia Letlow.
Letlow and State Treasurer John Fleming are headed into Saturday’s runoff with the nomination still up for grabs after both beat incumbent Sen. Bill Cassidy in the initial primary earlier this month.
The latest polling has given Fleming some momentum, but the broader prediction-market picture still seems to assume Letlow, President Donald Trump’s choice, will win.
Prediction Markets pick Letlow
The market view has not changed much since the race got messy earlier this spring. Letlow placed first in the initial vote with 45%, but did not clear the 50% threshold needed to win the nomination outright.
Fleming placed second with 28% of the vote, just ahead of Cassidy at 24%.
Prediction markets have favored Letlow since she entered the race in January at Trump’s urging. She is priced at 80% on Kalshi on $1.4 million in volume and 80% on Polymarket with $489,000 in volume.
Fleming has path to Louisiana Senate
Still, this runoff is not just a formality. Recent polling has Fleming ahead. Local media coverage suggests he has a real shot to close the deal if he can hold his coalition together through Saturday.
That is enough to keep the race interesting, especially because Letlow entered the runoff with enough recognition and institutional support to make this more than a straight-line march to a Fleming win.
This is a competitive Republican runoff, but one that takes place in a state where the general election outcome is still expected to be lopsided.
Trump and the inside game
Trump’s presence still hangs over the race, but not in the same way it does in a tossup. His backing has mattered in shaping the field, and that is part of why the race got messy in the first place.
He urged Letlow into the race, but Fleming also touted his time as Trump’s deputy chief of staff during his first term.
By runoff week, the campaign has become more about local alignment, turnout, and which candidate can consolidate the right kind of Republican voters at the end.
That makes the runoff a useful test of strength inside the party, not just a one-off endorsement exercise. Fleming’s current momentum shows that the race can still move late, while Letlow’s position suggests there is enough support for a comeback if the final turnout breaks her way.
What the polls say
The gap between the polls and the markets is what gives this story some bite.
The NYT polling page suggests the race is closer than prediction markets imply, and that mismatch is exactly the kind of thing we like to flag. If the polls are right, Saturday could be much more competitive than the markets think.
Louisiana’s GOP Senate runoff is competitive enough to matter inside the party, but probably not competitive enough to change the November picture in the battle to control the Senate.
Fleming has momentum, Letlow has a path, and the prediction markets still treat the seat like a durable Republican hold. That makes Saturday less of a Senate-control cliffhanger and more of a nomination fight, with a lot of attention packed into a race that may still end in a pretty ordinary fall outcome.
