Days before the election, Kennedy posted on social media that a Trump White House would advise all U.S. water systems to remove fluoride from the public water supply, which goes against public health recommendations yet jibes with a large number of people who question the safety of fluoridating water.

For years, local water authorities have considered the addition of low concentrations of fluoride to drinking water a public health achievement. The Centers for Disease Control and Prevention recommends it, citing evidence showing that fluoride prevents cavities in children — the No. 1 chronic disease in kids.

The CDC calls the practice of adding fluoride to tap water systems one of the 10 greatest public health achievements of the last century.

One compares Kennedy being considered to “having somebody who doesn’t believe in gravity being the head of NASA.”

Kennedy, a vaccine skeptic, has promised sweeping changes to food and drug regulation and government-funded scientific research.

President-elect Trump has selected vaccine skeptic Robert F. Kennedy Jr. to lead the nation's top health care agency, which would give him power over food and drug regulation, Medicare and Medicaid policy,