Louisiana Senate Primary: Cassidy Eliminated as Letlow and Fleming Advance to June Runoff
Why It Matters
Louisiana’s Republican Senate primary delivered a significant upset, ending the political career of incumbent Sen. Bill Cassidy and setting up a June runoff that will determine the state’s next U.S. senator. The result reshapes the Louisiana congressional delegation and reflects ongoing tensions within the Republican Party over alignment with national leadership.
What Happened
Sen. Bill Cassidy was eliminated from Louisiana’s Republican Senate primary on May 17, falling short of the threshold needed to advance. Rep. Julia Letlow and state Treasurer John Fleming secured the top two spots in the contest, earning their places in a June 27 runoff.
Cassidy, a two-term Republican senator, had been a politically vulnerable incumbent following his 2021 vote to convict President Donald Trump during the Senate impeachment trial — a decision that drew sustained backlash from Louisiana Republicans. Cassidy addressed supporters after his loss, acknowledging the primary result.
By the Numbers
- June 27: Scheduled date of the Republican Senate runoff between Letlow and Fleming
- 2: Terms Cassidy served in the U.S. Senate representing Louisiana
- 2021: Year Cassidy voted to convict Trump, triggering a Louisiana Republican Party censure
- 2 candidates: Rep. Julia Letlow and state Treasurer John Fleming advance from the primary field
Zoom Out
The Louisiana result is one of several high-profile Senate primaries reshaping the 2026 electoral map. Elsewhere on the same evening, Texas saw its own Republican Senate primary advance to a runoff between Sen. John Cornyn and Attorney General Ken Paxton, and Ohio produced results across both parties. Candidates seen as aligned with President Trump’s agenda generally performed well across multiple states.
Louisiana’s primary system, which uses a jungle primary format for some races, has previously produced competitive runoffs. An estimated 42,000 Louisiana voters cast absentee ballots ahead of related primary contests earlier this cycle, reflecting elevated early-vote participation in the state.
What’s Next
Letlow and Fleming will face each other in the June 27 runoff to determine the Republican nominee. The winner will be heavily favored in the general election in a state that has voted reliably Republican at the federal level. Both candidates are expected to compete aggressively for the support of Cassidy’s former backers as well as voters aligned with national Republican leadership.
Cassidy’s departure, assuming no further role in the race, marks the end of a Senate tenure that included bipartisan legislative work on infrastructure and healthcare — and the politically costly impeachment vote that defined his final term. Louisiana voters will also weigh other state-level political developments as the summer election season intensifies.