About
Cassidy, William A Senator and a Representative from Louisiana; born in Highland Park, Lake County, Ill., September 28, 1957; B.S., Louisiana State University, Baton Rouge, La., 1979; M.D., Louisiana State University Medical School, New Orleans, La., 1983; physician; member of the Louisiana state senate, 2006-2008; elected as a Republican to the One Hundred Eleventh and to the two succeeding Congresses (January 3, 2009-January 3, 2015); was not a candidate for reelection to the House of Representatives but was elected as a Republican to the United States Senate in 2014 for the term ending January 3, 2021; reelected in 2020 for the term ending January 3, 2027; chair, Committee on Health, Education, Labor, and Pensions (One Hundred Nineteenth Congress).
Official Biography · U.S. Congress.
Performance & Participation
Votes CastBottom 25%
95% — Voted in 822 of 869 roll call votes this congress.
Avg 97% · Most: 100% · Least: 87%
Vote IndependenceMiddle 50%
1.9% — Voted against their own party majority 15 of 811 times.
Avg 2.8% · Most independent: 19.0% · Most party-line: 0.0%
Cosponsors AttractedTop 25%
506 — Attracted 506 cosponsors across 116 bills.
Avg 320 · Most: 967 · Least: 0
Cosponsors Attracted Cross-AisleTop 25%
214 — Attracted 214 cosponsors across the aisle.
Avg 79 · Most: 354 · Least: 0
Cosponsorships GivenMiddle 50%
329 — 329 bills cosponsored.
Avg 330 · Most: 727 · Least: 30
Cosponsorships Given Cross-AisleMiddle 50%
81 — 81 bills cosponsored across the aisle.
Avg 94 · Most: 425 · Least: 0
Social Media ToneiTop 25%
NegativePositive
Avg +0.65 · Most: +0.93 · Least: +0.48
Press Release ToneiTop 25%
NegativePositive
Avg +0.33 · Most: +0.62 · Least: +0.09
Senator Bill Cassidy Urges Social Security Fix With Just 22 Days Left In Congress: ‘The Time Is Always Right To Do The Right Thing’
Benzinga · Nov 7, 2026
Lindsey Graham's Most Famous Quote Returns To Haunt His Sister
The National Memo · Nov 6, 2026
Julia Letlow Wins Senate Seat as Louisiana Elections See Mixed Results and Runoffs
Headtopics · Nov 6, 2026
Will Sutton: As states elect Black governors and senators, when will Louisiana join the party?
The Advocate · Nov 5, 2026
Julia Letlow narrowly wins Louisiana’s U.S. Senate election as other Republicans fall
The Advocate · Nov 4, 2026
