Recently fired members of a committee that advises the federal government on immunization safety lashed out at Health and Human Services Secretary Robert F. Kennedy Jr., saying that their terminations will limit access to vaccines and put American lives at risk.

The Trump era is rife with Republicans who abandon their principles in the name of toeing Donald Trump’s line. But few have gambled with those principles recently like Louisiana Republican Sen. Bill Cassidy.

Robert F. Kennedy Jr.’s actions at the CDC “put U.S. families at risk of dangerous and preventable illnesses,” they say.