By Emmanuel Bobby
Sen. Bill Cassidy saw his two-decade political career come to a dramatic end Saturday after failing to advance in Louisiana’s Republican Senate primary, a defeat that underscored the enduring political power of President Donald Trump and the risks Republicans face when they openly break with him.
Cassidy’s loss marks one of the clearest examples yet of Trump’s ability to reshape the Republican Party around personal loyalty, particularly toward lawmakers who challenged him after the Jan. 6, 2021, Capitol riot.
The Louisiana senator was eliminated from the race as Trump-backed Rep. Julia Letlow and Louisiana State Treasurer John Fleming advanced to a June 27 runoff election. In heavily Republican Louisiana, the winner of that runoff is expected to be the overwhelming favorite in the general election this fall.
For Trump, Cassidy’s defeat represents another victory in his long-running effort to politically punish Republicans viewed as insufficiently loyal to him. Since leaving office after his first term and returning to power in 2024, Trump has maintained an iron grip over the Republican base, often using endorsements and public attacks to determine the political survival of GOP candidates.
Cassidy’s downfall was rooted largely in one defining moment: his decision in 2021 to vote to convict Trump during the Senate impeachment trial following the Capitol attack.
At the time, Cassidy had only recently secured re-election to a second Senate term by a commanding margin. Many political observers were surprised by his vote because the Louisiana Republican was not widely known as a frequent rebel within his party.
Throughout most of his Senate career, Cassidy cultivated an image as a pragmatic conservative willing to voice moderate concerns on issues such as healthcare and public policy. However, despite occasional criticism of Republican positions, he usually voted with his party when it mattered most.
That changed during Trump’s second impeachment trial.
“Our Constitution and our country is more important than any one person,” Cassidy declared after casting his vote. “I voted to convict President Trump because he is guilty.”
The statement instantly transformed Cassidy into one of the Republican Party’s most prominent internal critics of Trump during one of the most volatile periods in modern American politics.
Trump never forgave the vote.
Over the past several years, the president has aggressively targeted Republicans who either voted to impeach him in the House or convict him in the Senate. Most of those lawmakers have since retired, lost primaries or chosen not to seek re-election.
Among the seven Republican senators who voted to convict Trump, only Lisa Murkowski and Susan Collins remain in office alongside Cassidy before his defeat. In the House, only a handful of Republicans who voted to impeach Trump still remain in Congress.
Cassidy’s loss highlights the political reality inside today’s Republican Party: even lawmakers with deeply conservative voting records can struggle to survive if they publicly oppose Trump.
In practice, Cassidy voted with Trump’s agenda the vast majority of the time during both of Trump’s presidencies. He consistently supported Republican judicial nominees, administration officials and major legislative priorities.
A recent advertisement from the National Republican Senatorial Committee even highlighted Cassidy’s support for Trump’s major tax and spending legislation, praising both men for delivering tax cuts and conservative economic policies.
But policy alignment ultimately proved less important than personal loyalty in the eyes of many Republican voters.
Cassidy also drew criticism in recent years for his uneasy relationship with the “Make America Healthy Again” movement championed by Health Secretary Robert F. Kennedy Jr..
As a physician and chairman of the Senate Health Committee, Cassidy repeatedly expressed concern about Kennedy’s skepticism toward vaccines and some of his public health positions. During confirmation proceedings, Cassidy openly questioned Kennedy’s record and sought reassurances regarding vaccine policy.
Yet despite his reservations, Cassidy ultimately provided a crucial vote that helped confirm Kennedy into office.
That pattern — voicing discomfort but ultimately siding with Republicans — defined much of Cassidy’s Senate career.
A similar example emerged in 2017 during the Republican effort to repeal the Affordable Care Act. Cassidy drew national attention after appearing on “Jimmy Kimmel Live” and insisting that any replacement healthcare bill should pass what he called the “Jimmy Kimmel test,” meaning it should not harm children with serious medical conditions.
The comments generated widespread media attention and positioned Cassidy as a potentially moderate voice during the healthcare debate.
However, he later voted in favor of the Republican repeal effort anyway, including provisions critics argued weakened protections for people with pre-existing conditions. The legislation narrowly failed in the Senate.
More recently, Cassidy also criticized federal immigration enforcement following a controversial Department of Homeland Security shooting incident in Minnesota earlier this year. He described the episode as “incredibly disturbing” and warned that the credibility of immigration authorities was at stake.
Still, Cassidy ultimately supported Republican-backed legislation and enforcement policies connected to the administration’s immigration agenda.
That recurring tendency — public hesitation followed by party-line votes — frustrated both conservatives and moderates at different points in his career. To Trump loyalists, however, none of Cassidy’s later support for Republican priorities erased his impeachment vote.
Trump’s influence over the Louisiana race became increasingly direct as the campaign intensified. Earlier this year, the president publicly urged Letlow to enter the race, posting an enthusiastic endorsement on Truth Social with the message: “RUN, JULIA, RUN!!!”
Letlow officially launched her campaign just days later and quickly consolidated support among Trump-aligned conservatives.
Meanwhile, Cassidy struggled to overcome growing hostility from segments of the Republican base who viewed his impeachment vote as unforgivable.
The senator’s defeat now serves as another warning to Republicans considering public opposition to Trump, even on matters involving constitutional questions or institutional norms.
For years, Cassidy built a reputation as a thoughtful conservative physician willing to occasionally challenge his party rhetorically. In the end, however, one break with Trump proved politically fatal.
Now, Louisiana Republicans will choose between Letlow and Fleming in the runoff, while Cassidy prepares to leave public office after nearly 20 years in state and federal government.
His political career, once defined by legislative experience and policy expertise, will likely be remembered most for a single vote that reshaped his standing within the Republican Party forever.
Original article
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