Kennedy, a harsh and persistent critic of childhood vaccination, led the nation’s top antivaccine organization for years.

Robert F. Kennedy Jr. has said vaccines are not safe. His support for abortion access has made conservatives uncomfortable.

Patrick Kennedy suggests Robert F. Kennedy Jr. would be open to use of addiction medications as well as "wellness farms" for opioid use disorder.

Kennedy Jr., President Trump's pick for health secretary, has falsely linked vaccines to autism and argued people should have separate vaccination schedules based on their race.

In a harsh letter to lawmakers considering Robert F. Kennedy Jr.’s nomination for health secretary, Ms. Kennedy called her cousin unfit for the job and a “predator” who led family members to addiction.

"He put baby chickens and mice in the blender," she says of her cousin, chosen by President Trump to head HHS.

Caroline Kennedy wrote a letter to the Senate Committee on Health, Education, Labor and Pensions strongly discouraging them from confirming her cousin Robert F. Kennedy Jr. as U.S. Department of Health and Human Services secretary.

WASHINGTON (AP) — Calling Robert F. Kennedy Jr. a “predator” who is addicted to power, Caroline Kennedy urged the U.S. Senate in a Tuesday letter to reject the nomination of her cousin to be President Donald Trump’s health secretary.

In a letter to senators, Caroline Kennedy etches a damning sketch of her cousin, the latest condemnation Robert F. Kennedy Jr. has received from members of his family.

Caroline Kennedy, a member of the famed U.S. political family, urged senators on Tuesday to reject her cousin Robert F. Kennedy Jr.'s nomination to lead the top U.S. health agency, calling him a "predator" and his healthcare views "dangerous.

If confirmed by the Senate to be the nation’s health secretary, Robert F. Kennedy Jr. would have vast powers over immunization policies for children and adults.