Robert F. Kennedy Jr., President Donald Trump’s nominee to head the US Department of Health and Human Services, told a US Senate committee that he would not stop anyone from getting polio and measles vaccines.

Robert F. Kennedy Jr. told the Senate Finance Committee that he is not anti-vaccine during his confirmation hearing for secretary of health and human services.

Kennedy Jr. rejected characterizations of him as an anti-vaxxer in a Senate hearing Wednesday where senators will weigh his confirmation as Health and Human Services Secretary—as his former billionaire running mate threatens to fund primary challenges against lawmakers who vote against him.