Sen. Bill Cassidy, the top Republican on the Senate Committee on Health, Education, Labor and Pensions, concluded Thursday's hearing by saying he was "struggling" with the nomination due to Kennedy's vaccine positions. Kennedy notably refused to say vaccines don't cause autism as he faced pointed question from lawmakers.

Robert F. Kennedy Jr., President Donald Trump's pick to lead the top U.S. health agency, is set to face a grilling from Senate Democrats and Republicans on Wednesday over his views on vaccines, abortion,

Cassidy is expected to challenge RFK Jr. on his vaccine skepticism and views on public health in today's confirmation hearing.