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

Robert F. Kennedy Jr.'s record of questioning childhood vaccine safety came under fire from a key Republican at the Trump HHS pick's confirmation hearing.

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

On the second day of Robert F. Kennedy Jr.’s contentious confirmation hearings, GOP senator and health and education committee chair Bill Cassidy appeared to be balancing his support for President Trump against his serious misgivings about Kennedy heading the Department of Health and Human Services — and how one could harm the other.

While Democrats blasted Robert F. Kennedy Jr. for previous comments on vaccines and some Republicans teed him up for stump speeches, Sen. Bill Cassidy of Louisiana mostly stuck

Senator Bill Cassidy, a physician and key G.O.P. vote, joined Democrats in aggressively questioning Robert F. Kennedy Jr., President Trump’s pick for health secretary. He did not say how he would vote.

If approved, Kennedy will control a $1.7 trillion agency that oversees food and hospital inspections, hundreds of health clinics, vaccine recommendations and health insurance for roughly half the country.

Louisiana Gov. Jeff Landry has urged the U.S. Senate — including specifically Sen. Bill Cassidy, a fellow Republican from Louisiana — to support Robert F. Kennedy Jr., President Donald Trump's nominee to lead the U.S. Department of Health and Human Services.

La., said he was "struggling" with Robert F. Kennedy Jr.'s nomination to be health and human services secretary at his confirmation hearing.

More dramatic questioning on vaccines in RFK Jr's second confirmation hearing. Bond/Simmons-Duffin/Stone/Webber

President Trump added to the turmoil, saying with no evidence that the crash could have been caused by diversity, equity, and inclusion efforts at the Federal Aviation Administration.