RFK Jr. was the great hope for autism families. Now, they're not so sure.

Chip Somodevilla/Getty Images; Alyssa Powell/BI

As a prominent vaccine skeptic, Kim Mack Rosenberg was elated when Robert F. Kennedy Jr. took the reins at the Department of Health and Human Services. She's been a key player in RFK's movement to Make America Healthy Again, serving as the general counsel for Children's Health Defense, the nonprofit he founded in 2015.