Kennedy, a Democrat who ended up supporting Trump in the 2024 presidential campaign, faced a confirmation grilling Wednesday over his controversial views -- on everything from vaccines to abortion -- that have both Republicans and Democrats raising concerns.

Sen. Elizabeth Warren discussed her viral back-and-forth with RFK Jr. on Thursday during an interview on "The View," saying the U.S. could be left with "no vaccines."

If he's put in charge of Health and Human Services, he has a whole tool box of ways that he very quietly can undermine vaccines and vaccine manufacturers—and he can get rich doing it.”