Some GOP senators want public commitments from Robert F. Kennedy Jr. before deciding whether to support him as the next secretary of the Department of Health and Human Services, signaling that President Donald Trump’s pick will have to win over uncertain Republicans in order to secure the job.

Public health experts answered questions from Democratic Senators about whether vaccines cause autism, whether manufacturers should be immune from liability for vaccine injuries, whether vaccines are adequately studied,

RFK Jr. played a lead role in building an case against Merck's HPV vaccine and could profit from the lawsuit alleging fraud, even if confirmed as health secretary.