Caroline Kennedy on Tuesday warned that her cousin Robert F. Kennedy Jr. is a “predator” ahead of his high-profile ...

Kennedy said in the letter that her cousin’s views on vaccines are disqualifying. She offered senators personal details from their lives growing up together that she said pose an even greater concern.

Kennedy is the country's most well-known anti-vaccine activist, and could soon lead be Trump's top health official.

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

Caroline Kennedy, the sole surviving child of President John F. Kennedy, has delivered a scathing critique of her cousin, ...