President Donald Trump's pick to lead the Department of Health and Human Services, Robert F. Kennedy Junior, fielded tough questions during his confirmation hearing.

Trump's pick for HHS Secretary faces questions from the left and right over his health stances. But will that stop his confirmation? Follow along for updates.

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. said he supports vaccines and vowed to lessen the burden of chronic diseases during fiery questioning from senators who will decide whether to confirm him as President Trump’s health secretary.