Leaving office January 3, 2027.Did not run for re-election in 2026. This page switches to the former-officeholder layout when the term ends.

RepublicanIn office until January 3, 2027

Bill Cassidy

U.S. Senator from Louisiana since 2015. Did not run for re-election in 2026; leaves office in January 2027. Ran in 6 elections between 2007 and 2014, winning 6.

U.S. Senator from LouisianaBorn 1957

Official website Wikipedia Congress.gov FEC filings

In office: 11 yrs; Since 2015
Bills became law: 1; 121 sponsored, 119th Congress
Votes missed: 5.5%; Chamber median 2.1%
With party: 98%; On votes splitting the parties
Last margin: +4.3; Won 2014
Elections: 6; 2007–2014

Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Nov 7, 2026, 3:00 PM ET

Committees

119th Congress.

Senate Committee on Energy and Natural ResourcesEnergyNational ParksWater and Power
Senate Committee on FinanceFiscal Responsibility and Economic GrowthHealth CareTaxation and IRS Oversight
Senate Committee on Health, Education, Labor, and Pensions · ChairmanEducation and the American Family · Ex OfficioEmployment and Workplace Safety · Ex OfficioPrimary Health and Retirement Security · Ex Officio
Senate Committee on Veterans' Affairs

Source: congress-legislators committeesUpdated Nov 7, 2026, 3:00 PM ET

Legislation

119th Congress · 121 sponsored · 1 became law

BillIntroCmteSenateHouseLaw

S 331 HALT Fentanyl Act
Crime and Law Enforcement · Became law Jul 2025

Source: Congress.gov billsUpdated Nov 6, 2026, 3:27 PM ET

Voting record

119th Congress · placement by roll-call votes

Where Cassidy sits in the U.S. Senate

Cassidy is closer to the center than 84% of the chamber's Republicans.

Closest: John Thune, Darline Graham, Jerry Moran

Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 5:06 PM ET

With Cassidy’s party

Votes with the chamber's Republicans98%
Cosponsorships of the other party's bills29%

Black tick: the average of Republicans in the U.S. Senate.

Source: 99chambers legislative scores from roll calls and cosponsorships

Key votes

Votes chosen for their effect, not their side: Cassidy’s vote, each party’s majority, and the result. An orange vote differs from most Republicans.

Date	Bill	Cassidy	Rep. majority	Dem. majority	Result
Jun 5, 2026	S 2: Secure America Act	Yes	Yes	No	Passed 52–47
Apr 16, 2026	HJRES 140: Providing for congressional disapproval under chapter 8 of title 5, United States Code,…	Yes	Yes	No	Passed 50–49
Feb 12, 2026	HJRES 142: Disapproving the action of the District of Columbia Council in approving the D.C.…	Yes	Yes	No	Passed 49–47
Jan 30, 2026	HR 7148: Consolidated Appropriations Act, 2026	Yes	Yes	No	Passed 71–29
Dec 4, 2025	HJRES 131: Providing for congressional disapproval under chapter 8 of title 5, United States Code,…	Yes	Yes	No	Passed 49–45

Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls

Career

Offices held, and every time Cassidy was on a ballot. Filled marks are general elections won; hollow marks are primaries; an orange outline is a loss.

20082010201220142016201820202022202420262028Louisiana State Senate, District 16 U.S. House, LA-6 U.S. Senate, Louisiana

Source: 99chambers results archive (MEDSL, Klarner, state election offices)

Elections

Margin against the seat’s presidential baseline: how the seat voted for president in the same or nearest year.

Year	Race	Result	Margin	Seat	+/−
2014	U.S. Senate, Louisiana (runoff)	Won	+11.9	R+17.5	−5.6
2014	U.S. Senate, Louisiana	Won	R+4.3	R+17.5	−13.2
2012	U.S. House, LA-6	Won	R+68.9	—	—
2010	U.S. House, LA-6	Won	R+31.3	—	—
2008	U.S. House, LA-6	Won	R+7.8	—	—
2007	Louisiana State Senate, District 16	Won	R+60.3	—	—