Senator Bill Cassidy, a Republican physician and vaccine proponent who is facing a primary challenge from the right, has a fraught relationship with the health secretary.

In sharply worded questions, Sen. Bill Cassidy (R-La.) tangled with Health and Human Services Secretary Robert F. Kennedy Jr. about mRNA vaccines and conflicts of interest among Kennedy’s

Senator Bill Cassidy was the swing vote to confirm RFK Jr. as the nation's health secretary despite reservations over Kennedy's vaccine skepticism.

Last month, Cassidy voiced concern after Kennedy's June firing of the CDC's Advisory Committee on Immunization Practices. Cassidy had noted “serious allegations” about the outside group of experts that has been reshaped by Kennedy, a leading anti-vaccine activist before becoming the nation’s top health official.

WASHINGTON – Louisiana Gov. Jeff Landry took exception to U.S. Sen. Bill Cassidy’s suggestion that the state surgeon general could easily get around recent federal hurdles for everyday people trying to access the COVID vaccine.