U.S. Senate Race in Louisiana Heats Up with Serious Accusations

The gloves are definitely off in the race for the U.S. Senate in Louisiana. Things have certainly shifted into high gear following a high-profile endorsement from President Donald Trump that has left incumbent Senator Bill Cassidy facing a steep uphill battle for reelection.

What Does the Trump Endorsement Mean for Letlow?

In a move that reverberated across the state's political landscape, President Trump officially threw his "complete and total" support behind U.S. Representative Julia Letlow. The endorsement praised Letlow as a "total winner," signaling a clear preference for a fresh face in the Republican field.

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The "Scarlet Letter" and the Cassidy Conundrum

For Senator Bill Cassidy, the entry of Letlow—coupled with the President's public backing—represents a significant threat to his path to a third term. Political analysts point to Cassidy’s 2021 vote to impeach Donald Trump as a lingering point of contention for the Louisiana GOP base.

Dr. Jeff Sadow, a political science professor at LSU Shreveport, tells KEEL News the incumbent is in a precarious position. "Cassidy is in serious trouble," Sadow noted. "In fact, if you put a gun to my head and said who are the two people who are gonna make the runoff, I’d say Letlow and Fleming."

The entry of a popular, Trump-backed candidate like Letlow complicates the math for Cassidy, who must now defend his record against two formidable challengers on his right.

"Letlow entering the races is a disaster for Cassidy," says Sadow. "She largely courts the same base, but she doesn’t have the scarlet letter next to her name. That being of course, Cassidy’s vote for the impeachment of Trump."

A Three-Way Clash Under New Rules

While Letlow and Cassidy battle for the spotlight, State Treasurer John Fleming keeps chugging along. With the recent withdrawal of other candidates, the field has narrowed, potentially benefiting Fleming’s "consistent conservative" branding.

"With the recent departure of candidates in the race, Fleming is the clear shot as the so-called consistent conservative in the race," Sadow observed. "Letlow and Cassidy are fighting over the same scraps and Cassidy might very well be left out."

Navigating the New Closed Primary System

A major factor in this race is Louisiana's transition to a closed primary system for congressional offices in 2026. This is a significant departure from the state's traditional "jungle primary." In this new system, Republican candidates will face off exclusively against other Republicans.

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What this means for voters:

Registered Republicans: Can only vote on the Republican ballot.

Registered Democrats: Can only vote on the Democratic ballot.

"No Party" (Unaffiliated) Voters: These voters must choose one party's ballot to vote on for the primary. Once they choose, they are "locked in" and must use that same party's ballot if a runoff occurs.

Third-Party Voters: Voters registered with any other party (such as Libertarian or Green) are excluded from the primary entirely and must wait until the general election in November to cast their votes for these offices.

Important Dates and Deadlines in Senate Race

Qualifying for the Senate race will happen next week between February 11–13. For voters, the registration deadlines for the primary are:

In-Person/Mail-In Registration: April 15, 2026

Online Registration (GeauxVote): April 25, 2026

The 2026 Election Calendar:

Party Primary Election: May 16, 2026

Primary Runoff (if necessary): June 27, 2026

General Election: November 3, 2026

What the Attack Ads Are Already Saying

As the campaign heats up, attack ads have begun to surface. A PAC supporting Cassidy has recently attempted to paint Letlow as a liberal—a claim Sadow finds mathematically dubious.

Sadow says the voting records of Cassidy and Letlow are not very different from each other. Sadow says this is really helping Fleming. "If you have these other two fighting, then he’s gonna be able to pick up the pieces. And that’s why I think Letlow and Fleming have the best chance of making the runoff."