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Sen. Bill Cassidy faces first primary since his Trump impeachment vote

Letlow is challenging Cassidy with Trump’s backing and has emphasized her alignment with the MAHA movement.

Sen. Bill Cassidy faces first primary since his Trump impeachment vote
Image · NBC New York

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This article1 analysis · Oct 6, 2026

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217 stories · 85–86 · updated Oct 7, 2026

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NBC New Yorkvia NBC News
May 16, 2026
tl;dr

Louisiana voters are choosing among Sen. Bill Cassidy and two challengers in a Republican primary that tests the political impact of Cassidy’s 2021 vote to convict Donald Trump. The race also features competing endorsements, disputes over the primary rules and more than $30 million in reported ad spending.

Community verdict

VOTING CLOSED
How does this story look for
Julia Letlow R · LA-5
NOT RATEDCLOSED

No good or bad look here

This story reports what happened without casting Letlow in a good or bad light, so readers don’t rate it and it doesn’t count toward Letlow’s record.

● INFORMATIONAL

People in this story

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Julia Letlow
R · LA-5

Louisiana representative and Republican Senate primary challenger

PRIMARY SUBJECT

Louisiana Senate candidate challenging Cassidy

Fleming's version of this story ↗
Bill Cassidy
R · LA · SEN

Louisiana senator facing a Republican primary challenge

Cassidy's version of this story ↗
Mike Johnson
R · LA-4

House speaker who did not endorse a candidate

Donald Trump
R · President of the United States

President who endorsed Letlow and is central to the discussion of Cassidy’s impeachment vote

John Thune
R · SD · SEN

Senate majority leader who expressed support for Cassidy

Robert F. Kennedy Jr.
R · Secretary of Health and Human Services

Health and Human Services secretary whose vaccine views have clashed with Cassidy

ALSO MENTIONED  Casey Means, Trump’s former nominee for surgeon general; Jeff Landry, Louisiana governor backing Letlow who changed the primary system and delayed House primaries

Part of a bigger story

43 OUTLETS
Julia Letlow Advances to Louisiana Senate Runoff

Julia Letlow and John Fleming advanced to a runoff in Louisiana’s Republican Senate primary, while Bill Cassidy finished third and did not advance. Letlow had President Trump’s endorsement. Center outlets emphasize the result and often present the race as a test of Trump’s influence, with Cassidy’s impeachment vote as context. Right-leaning outlets also stress Trump’s role but more often cast Cassidy’s loss as payback for that vote.

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