Vermont Sen. Bernie Sanders questioned Health Secretary nominee RFK Jr. on vaccine stance, calling responses "troubling" and "problematic."

Robert F. Kennedy Jr.’s nomination to be the nation’s top health official is uncertain after a key Republican joined Democrats to raise persistent concerns over the nominee’s deep skepticism of routine childhood vaccinations that prevent deadly diseases.

During the first round of his Senate confirmation hearings, Robert F. Kennedy Jr., President Donald Trump’s pick for U.S. Department of Health and Human Services secretary, appeared to be at odds with his past self.

Robert F. Kennedy Jr. floundered when Bernie Sanders pressed the prospective health secretary on whether the COVID vaccine saved lives. All he could say was, “I don’t know.” Although Kennedy has aimed to convince senators that he is not anti-vaccine during his two days of confirmation hearings,

Kennedy appeared before the Senate Finance Committee on Wednesday as he seeks confirmation as the nation's health secretary.

Sen. Bernie Sanders (I., Vt.), thought to be a possible “yes” vote on Robert F. Kennedy Jr. because they have some shared views on food safety and obesity, grilled Kennedy on his views on abortion and vaccines.

Robert F. Kennedy Jr. went before the Senate Health Committee Thursday as President Trump's nominee for secretary of Health and Human Services.

Watch live as RFK Jr. faces questions from senators in his confirmation hearing as President Trump’s nominee to lead the Department of Health and Human Services.

RFK Jr.’s famous name and controversial views collide in his bid for top health job Robert F. Kennedy Jr. has said vaccines are not safe. His support for abortion access has made conservatives uncomfortable.