The Last Standing Conviction Voter
Bill Cassidy occupies one of the most politically precarious positions in the entire United States Senate. When he voted on February 13, 2021 to convict Donald Trump for incitement of insurrection in the second Senate impeachment trial, he joined six other Republican senators in crossing party lines. The Louisiana Republican Party censured him within hours — one of the fastest intra-party repudiations in modern Senate history. That vote, and the ongoing consequences it carries, defines Cassidy's political reality heading into 2026.
Every other Republican senator who voted to convict Trump has since left the Senate: Richard Burr retired, Rob Portman retired, Pat Toomey retired, Ben Sasse resigned to become a university president, Lisa Murkowski survived a ranked-choice primary in Alaska but remains in a unique category, and Mitt Romney resigned. Cassidy is the only senator from that group who voted to convict and is now facing a Republican base electorate in a state Trump won by more than 20 points. The political math is daunting.
Despite the political headwinds, Cassidy has continued operating as a policy-focused legislator with genuine expertise in healthcare, infrastructure, and Social Security. He is a physician who worked in Baton Rouge before entering politics, and his medical background shapes his approach to healthcare in a way that earns him credibility as a substantive voice even among those who disagree with him. He voted for the 2021 bipartisan infrastructure law and has engaged in Social Security discussions that are politically dangerous for any senator. His 2026 elections will be one of the most watched primaries in the cycle.
- Bill Cassidy (R-LA) is a two-term Louisiana senator re-elected in 2020, one of seven Republican senators who voted to convict Trump in the 2021 impeachment trial — a vote that led to his censure by the Louisiana Republican Party.
- Louisiana is R+18 — deeply red, and Cassidy has calculated that his convicting vote was a matter of principle that his constituents may ultimately respect even if they initially opposed it.
- He is a physician (gastroenterologist) whose medical background drives his focus on healthcare — he was a key architect of bipartisan ACA replacement proposals and has worked across party lines on Medicare and Medicaid reform.
- Cassidy chairs the Senate Health, Education, Labor and Pensions (HELP) Committee and has been one of the Senate's most engaged members on healthcare cost transparency, drug pricing, and rural health access.
Key Policy Areas
Physician-Senator
Cassidy is one of the few physician-senators and his medical background gives him genuine depth on healthcare polling. He co-authored the Graham-Cassidy ACA repeal framework in 2017, the last serious Senate attempt at comprehensive healthcare legislation. He has worked on mental health parity, No Surprises Act (surprise medical billing reform), and Medicare-Medicaid policy with substantive expertise that transcends partisan talking points.
Bipartisan Infrastructure
Cassidy was a lead Republican negotiator on the 2021 Infrastructure Investment and Jobs Act, which passed with 19 Republican Senate votes. Louisiana's vulnerability to hurricanes, flooding, and coastal erosion makes infrastructure investment particularly salient for his constituents. He has argued that government investment in physical infrastructure is a legitimate conservative priority, even as the bill drew criticism from the right as a spending vehicle.
Solvency Reform Advocate
Cassidy has been one of the few senators willing to engage seriously with Social Security's long-term solvency challenges, working with Democrat Angus King on a framework for reform. Social Security faces projected trust fund depletion within roughly a decade, and Cassidy argues that doing nothing is itself a form of benefit cut. His willingness to discuss reform earns him bipartisan respect while creating additional vulnerability with conservative primary voters.
Electoral History
| Year | Race | Result | Margin |
|---|---|---|---|
| 2026 | Louisiana Senate (re-election) | TBD — Primary challenge expected | — |
| 2020 | Louisiana Senate (re-election) | Cassidy 59.4% — Adrian Perkins (D) 33.5% | R +25.9 |
| 2014 | Louisiana Senate (open) | Cassidy 55.9% — Mary Landrieu (D, inc.) 44.1% | R +11.8 |
The January 6th Conviction Vote
When the Senate convened on February 13, 2021 to render its verdict in Donald Trump's second impeachment trial, Cassidy was initially expected to vote to acquit — consistent with the overwhelming majority of Senate Republicans. Instead, he voted guilty, explaining that the evidence presented during the trial convinced him that Trump bore responsibility for the events of January 6th and that the Senate had jurisdiction to try a former president.
The Louisiana Republican Party's censure vote came within hours and passed 67-9. Cassidy publicly stated that the Louisiana party's swift, emotional reaction actually validated his concerns — arguing that the rushed condemnation without reviewing the evidence reflected exactly the kind of tribalism he was trying to reject. Whether Louisiana Republican base voters in 2026 see it that way is the central question of his political survival. No senator from a state Trump carried by double digits has previously survived a primary after such a high-profile defection.
Explore More
Watch: Cassidy Delivers Floor Speech Calling to Make Health Care Affordable
External resources: Bill Cassidy on Ballotpedia — Bill Cassidy on Wikipedia