(By Joe Cunningham/Substack) – The Associated Press called the Republican runoff for Letlow within an hour of polls closing at 8 p.m. Saturday, and the result was not close. She dominated the state’s population centers, swept most of the parishes she won in the May primary, and held Fleming largely to his old 4th Congressional District in the northwest corner of the state. Come November, she faces Democrat Jamie Davis, a northeast Louisiana farmer who won his party’s runoff the same night. The state hasn’t sent a Democrat to the Senate since 2008. That race is a formality.

Tonight’s result was the expected one. The path to it, and the wreckage of Fleming’s campaign along the way, are worth examining because this race tells you a lot about how Louisiana Republican politics works right now, and what it takes to lose a race you were never supposed to win.

Trump’s Endorsement Set the Table

Donald Trump endorsed Julia Letlow in January, before she had even formally entered the race. In a state where he carried 60% of the vote in 2024, his seal of approval gave her an early structural advantage that Fleming spent the entire campaign trying to overcome. One voter told NBC News that they were going with “Trump’s lady all the way. I always vote whatever Trump wants.”

That’s a real slice of the Louisiana Republican electorate, and Letlow had it locked from January.

But the endorsement explains her 45% finish in May. It doesn’t fully explain tonight. Fleming told voters he was blocked from reaching Trump by White House allies of Governor Jeff Landry. He claimed that when he finally got the president on the phone, he reminded Trump of his loyalty, and Trump replied, “You’re fantastic! Why didn’t you call?” The story may be true, but it didn’t matter. What sealed this race was that the money was ruthlessly deployed against Fleming, the governor’s political machine ran suppression operations on his support, and Fleming’s own campaign made strategic errors that left him with no viable path to expand his coalition.

The endorsement opened the door for Letlow. The other three factors drove the result.

The Money Was Never Close

Letlow raised $5.35 million in campaign contributions. Fleming loaned himself more than $11 million of his own money and raised more than $12.1 million total, making him the bigger spender on paper. The outside money tells a different story.

According to ad-tracking firm AdImpact, one super PAC backing Letlow led all spending in the race, putting up roughly $4 million since the May primary alone. A separate super PAC, the Accountability Project, reported $5.9 million in independent expenditures according to FEC records, with total outside spending near $10 million, with the vast majority directed against Fleming.

The Advocate reported that Landry hosted roughly 15 carbon capture industry executives at the Governor’s Mansion in April, where they heard a pitch to raise $1.5 million to defeat Fleming. Landry acknowledged holding the meeting but wouldn’t discuss what was said.

Fleming tried to reframe this as “dark money” with help from conservative radio host Moon Griffon, who moderated the May primary debate and subsequently endorsed Fleming. It generated online chatter but never produced a contrast message that reached persuadable voters outside his base.

Landry’s Machine Did Its Job

The governor’s fingerprints were on this race from the start. Jeff Landry consulted with Trump last year about Letlow entering the Senate race, endorsed her early, and deployed his political infrastructure (the same operation that consolidated the state Republican Party behind him in 2023) to suppress Fleming’s support and depress his numbers.

Much of that effort took the form of negative advertising. Outside groups aligned with Landry hammered Fleming on immigration, his service record, and his conservative credentials throughout the runoff period. Fleming’s campaign vigorously disputed the accuracy of several ads and documented their objections, but the volume was relentless. The goal wasn’t necessarily to persuade Fleming voters to switch to Letlow. It was to create enough noise and doubt around Fleming that soft supporters stayed home. In a race where turnout was projected at 15% statewide, keeping people on the couch is a strategy, and it worked.

Fleming Ran the Wrong Race

Here’s where I have some sympathy for Fleming’s supporters, if not for his campaign. He had a real issue. Carbon capture and sequestration is a genuine property rights controversy in Louisiana, and his opposition to using eminent domain to compel landowners to accept CO2 pipelines resonated with rural communities across central and southwest Louisiana.

But carbon capture is a state-level fight. It’s a question for the Legislature, the governor, and the courts. All three of those battles are actively underway. Courtrooms in Baton Rouge are litigating the constitutional questions right now. The 2026 legislative session produced more than 20 bills on the subject. A U.S. senator has limited jurisdiction over any of it. Voters who care most deeply about carbon capture and eminent domain are focused on Baton Rouge, not Washington. Fleming staked his Senate campaign on the issue anyway, and it limited his ceiling.

The Landry grudge compounded the problem. Fleming repeatedly accused the governor of “running Letlow’s campaign” and suggested he had been shut out of a Trump endorsement by Landry’s White House allies. There may be truth in that, but running against Jeff Landry in a race for federal office 1) when Landry isn’t on the ballot, 2) when he remains popular with the Republican base, and 3) when the argument requires voters to believe an unflattering story about their governor and their president.

That was not a winning frame. The Louisiana Illuminator noted that historically, state treasurers who sought higher office in Louisiana ran on their fiscal records. Fleming barely mentioned his.

A Campaign That Lived Online and Died There

Fleming’s campaign made a tactical error that should be studied. It went viral on social media and never reached the people who actually vote in Republican runoffs.

The most glaring example came in June when Fleming reposted an AI-generated video on X purporting to show Letlow defending her past support for DEI policies. The fake clip used her likeness and referenced her late husband, Luke Letlow, who won the 5th District House seat in December 2020 and died from COVID-19 complications on December 29, five days before he was to be sworn in. Letlow called it “unconscionable” and accused Fleming of making “a spectacle” of her husband’s death. Fleming said he didn’t create the video, “but it’s getting passed around Louisiana for a reason.” Letting AI-generated content do your campaign work and then maintaining public distance from it may generate engagement on X. It does real damage with the suburban and older voters who decide Republican primaries in this state.

The broader problem is that a coherent Senate-focused platform never emerged. What does John Fleming believe about federal tax policy? The reconciliation bill? The filibuster? Border enforcement? He had conservative credentials from his time as a founder of the House Freedom Caucus and eight years in Congress. That record should have been front and center. Instead, his campaign churned out online content, fought a proxy war against Landry on carbon capture, and let the personal grudge against the governor consume the message.

The Turnout Tells the Story

Roughly 15% of registered voters are expected to have cast ballots in this election, based on pre-election projections from Baton Rouge pollster John Couvillon. The May primary drew 28% turnout. That kind of drop is what low-salience runoffs look like in Louisiana, and it hit Fleming harder than Letlow.

His entire theory of the case depended on a highly motivated conservative base turning out in disproportionate numbers to overcome her institutional advantages in higher-turnout parishes. That’s a defensible runoff strategy. But it required his online coalition to actually show up at precincts on a Saturday in June, and by all public accounts, day-of turnout was abysmal across the board. When the electorate shrinks that far, the candidate with organized infrastructure, institutional endorsements, and PAC money behind her ground game wins. That was Letlow.

What Comes Next

Letlow heads to November as the overwhelming favorite. Louisiana is a 60-point Republican state at the federal level. She’ll join the Senate in January, and if she follows through on her pledge to support eliminating the filibuster, she’ll be in position to affect one of the most consequential structural debates in Washington over the next two years.

For Fleming, it’s hard to say for sure what’s next. He has his current office, Treasurer, at least until the next election. But there are already whispers out of Baton Rouge that Landry has recruited or is recruiting someone to run against Fleming, and after one statewide loss this year, he may not survive one next year.

For Louisiana Republicans who wanted a fighter with a longer conservative track record in Washington, tonight is a lesson in how the game is actually played. Platform matters less than positioning. Coalition-building matters less than institutional alignment. And in a low-turnout runoff with the governor’s machine running the clock, grassroots intensity online is not the same thing as votes.