The top Republican on the Senate's health committee, Sen. Bill Cassidy, R-La., faced criticism from fellow Republicans after he suggested his vote for Robert F. Kennedy Jr.'s confirmation as Health and Human Services secretary is not a lock.

The top Republican on the Senate's chief health committee, Sen. Bill Cassidy, R-La., indicated Thursday that he was “struggling" to confirm Robert F. Kennedy Jr. over his inability to admit vaccines are safe and don't cause autism.