Incumbent Republican Sen. Bill Cassidy trails challengers Rep. Julia Letlow and state Treasurer John Fleming in recent GOP primary polls, such as American Pulse (March 20-24) showing Letlow at 31%, Fleming at 25%, and Cassidy at 21%, amid heightened attack ads and endorsements including Trump's for Letlow. With Louisiana's partisan primaries set for May 16 and general election November 3, traders price Republicans at 91% implied probability to win the seat, reflecting the state's deep GOP lean—evident in 2020 and 2022 landslides—and Democrats' weak field of low-fundraising candidates like Nick Albares and Gary Crockett. Challengers could include a fractured GOP nominee post-primary, national midterm wave favoring Democrats, or unforeseen scandal, though historical precedents favor Republican dominance in safe seats.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Republican
91%

Democrat
7%

Republican
91%

Democrat
7%
A candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.
Candidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.
Market Opened: Oct 13, 2025, 4:48 PM ET
Resolver
0x2F5e3684c...A candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.
Candidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.
Resolver
0x2F5e3684c...Incumbent Republican Sen. Bill Cassidy trails challengers Rep. Julia Letlow and state Treasurer John Fleming in recent GOP primary polls, such as American Pulse (March 20-24) showing Letlow at 31%, Fleming at 25%, and Cassidy at 21%, amid heightened attack ads and endorsements including Trump's for Letlow. With Louisiana's partisan primaries set for May 16 and general election November 3, traders price Republicans at 91% implied probability to win the seat, reflecting the state's deep GOP lean—evident in 2020 and 2022 landslides—and Democrats' weak field of low-fundraising candidates like Nick Albares and Gary Crockett. Challengers could include a fractured GOP nominee post-primary, national midterm wave favoring Democrats, or unforeseen scandal, though historical precedents favor Republican dominance in safe seats.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated



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