Trump-backed challenger defeats Republican senator who voted to convict president

May 17, 2026

Republican Senator Bill Cassidy of Louisiana has been eliminated from his re-election bid after finishing behind two Trump-endorsed challengers in the state's primary election. Congresswoman Julia Letlow and State Treasurer John Fleming, both aligned with President Trump, will compete in a June runoff to determine the Republican nominee for the Senate seat. Cassidy's defeat stems largely from his 2021 vote to convict Trump during the post-January 6th impeachment trial, which Trump and supporters characterized as betrayal of party loyalty.

Who is affected

Senator Bill Cassidy (eliminated from re-election)
Congresswoman Julia Letlow (advancing to runoff)
State Treasurer John Fleming (advancing to runoff)
President Donald Trump (whose endorsements determined the outcome)
Louisiana voters and residents
The Republican Party in Louisiana
The seven Senate Republicans who voted to convict Trump in 2021
The unnamed Democratic candidate who will face the eventual Republican nominee

What action is being taken

Letlow and Fleming are advancing to a Republican runoff election scheduled for late June
Trump is actively campaigning against Cassidy through social media posts and public statements
Letlow is campaigning by criticizing Cassidy's loyalty to the Republican Party

Why it matters

This election demonstrates Trump's continued dominance over the Republican Party and his ability to effectively end the careers of Republicans who opposed him, even those who later attempted reconciliation. The defeat sends a clear message to other Republican elected officials about the political consequences of breaking with Trump, particularly regarding the January 6th impeachment vote. It also reduces the number of Senate Republicans willing to vote against Trump from seven to potentially just two (Collins and Murkowski), consolidating Trump's control over the party and potentially affecting future accountability measures.

What's next

Letlow and Fleming will face off in a runoff election in late June
The winner of the Republican runoff will run against a Democratic candidate in the general election

Read full article from source: BBC