Sen. Bill Cassidy has emerged as a central figure in the confirmation of Robert F. Kennedy Jr., whose nomination to health and human services secretary poses an equally consequential moment for the second-term Republican facing an uncertain political future in Louisiana.

RFK Jr. claimed he is not “anti-vaccine” and appeared unfamiliar with key aspects of healthcare insurance programs in his confirmation hearing.

As Robert F. Kennedy Jr. faced skeptical senators Thursday in the second day of his confirmation hearing to lead the department of Health and Human Services, Sen. Bill Cassidy confronted Kennedy about vaccines.

Robert F. Kennedy Jr.'s long record of questioning the safety of childhood vaccinations persisted as a flash point for him Thursday during a confirmation hearing where a key Republican quickly raised concerns about his views.

Caroline Kennedy urged senators to reject Robert F. Kennedy Jr.’s nomination as health secretary, questioning his ethics and views on vaccines.

Cassidy is expected to challenge RFK Jr. on his vaccine skepticism and views on public health in today's confirmation hearing.

Louisiana Sen. Bill Cassidy will be at the center of the first hearing for Robert F. Kennedy Jr.’s controversial Health and Human Services Secretary nomination.

The health committee chairman, Sen. Bill Cassidy, R-La., also has expressed concerns about Kennedy's anti-vaccine work. A physician, Cassidy said earlier this month he “had a frank conversation” and “spoke about vaccines at length” with Kennedy. On Tuesday, Cassidy told reporters that he is still unsure if he is backing Trump’s nominee.

Robert F. Kennedy Jr., President Trump’s nominee for health secretary, repeatedly confused Medicare and Medicaid. He also tried to convince senators he was not against vaccines, despite past statements.

Robert F. Kennedy Jr. was confronted with a number of his baseless claims and a vexing abortion issue. But Republican senators treaded lightly.

President Donald Trump's controversial pick to lead the Department of Health and Human Services, Robert F. Kennedy Jr., will testify in two Senate hearings starting Wednesday.