Letlow and Fleming Advance After Cassidy's Primary Defeat
Letlow and Fleming will meet in a June 27 runoff after Cassidy finished third with about 25% while Letlow led with about 45% and Fleming about 28%.

John Thune stays neutral after Cassidy loses shot at Senate runoff
Senate GOP leader declines to endorse in Louisiana runoff after Cassidy’s loss

Louisiana Sen. Bill Cassidy defeated, Julia Letlow and John Fleming advance to runoff, AP projects

Politico: 'Smartest Guy In the Political Morgue' Belatedly Realizes Trump's Relevance; UPDATE: NYT Too?
Overview
With nearly 100% of the estimated vote counted, tallies showed Rep. Julia Letlow led with about 45%, state Treasurer John Fleming about 28%, and Sen. Bill Cassidy about 25%, sending Letlow and Fleming to a June 27 runoff.
President Donald Trump endorsed Letlow in January, encouraged her to enter the race, and celebrated Cassidy's projected defeat after Cassidy was one of seven senators who voted to convict Trump in the 2021 impeachment trial.
Sen. Bill Cassidy conceded the primary, thanked voters, said "you don't pout, you don't whine, you don't claim the election was stolen," and made a thinly veiled jab at the president without naming him.
Cassidy's primary loss made him the first sitting senator to lose a primary since 2017 and the first elected incumbent senator to lose a primary since 2012.
Senate Majority Leader John Thune said he will not weigh in on the runoff, leaving the June 27 contest to be decided by Louisiana voters.
Analysis
Center-leaning sources frame Cassidy's loss as evidence of President Trump's punitive hold on the GOP, using loaded terms like 'casualty' and 'grip,' prioritizing examples of targeted Republicans and recent primary defeats, and organizing context around Trump's influence. Direct quotations (from Trump, Cassidy) appear as source content, not as editorial claims.