Louisiana GOP Senate Runoff Pits Letlow Against Fleming After Cassidy Primary Loss
The outcome will determine which Republican fills a seat held by a senator who was ousted by his own party's voters, a dynamic that may signal shifting priorities within Louisiana's GOP electorate...
Louisiana voters cast ballots Saturday in a Republican Senate runoff between U.S. Rep. Julia Letlow (R-LA-5) and former state treasurer John Fleming, according to live results reported by The Hill on June 27, 2026. The runoff was triggered because neither candidate surpassed 50 percent in the initial May primary, as required under Louisiana election law. Incumbent Sen. Bill Cassidy finished third in that primary, ending his Senate tenure after a single term.
Cassidy, who was first elected to the Senate in 2014 and re-elected in 2020, cast one of seven Republican votes to convict former President Donald Trump in the February 2021 Senate impeachment trial (Congressional Record, Feb. 13, 2021). The Louisiana Republican Party formally censured Cassidy following that vote, according to a resolution adopted by the state party in February 2021. His third-place finish in the May 2026 primary represented his first electoral contest since the censure.
Letlow, who has represented Louisiana's 5th Congressional District since winning a special election in April 2021, has filed campaign finance reports with the Federal Election Commission under committee ID H0LA05263. Fleming, a physician and former U.S. representative who served Louisiana's 4th Congressional District from 2009 to 2017, previously ran unsuccessfully for Senate in 2016. The specific fundraising totals and expenditures for both candidates' 2026 Senate campaigns are documented in FEC filings available at fec.gov; the most recent pre-runoff disclosure period would cover activity through June 2026.
The winner of Saturday's runoff will advance to the November 2026 general election for the seat. Louisiana uses a jungle primary system for federal races, meaning candidates of all parties appear on the same ballot in the first round. No Democratic candidate qualified for the runoff, meaning the seat's partisan outcome in November will depend on whether any general-election challenger qualifies under applicable filing deadlines — a detail that Louisiana's Secretary of State office would confirm through official candidate filings.
What remains unknown is the final vote margin between Letlow and Fleming, which live results had not yet finalized as of this report's publication. The certified result will be made public by the Louisiana Secretary of State's office. Additionally, the full scope of independent expenditures and outside spending in the runoff has not yet been reported; those figures will appear in post-runoff FEC disclosures due after the election date.