Robert F. Kennedy Jr. was confronted with a number of his baseless claims and a vexing abortion issue. But Republican senators treaded lightly.

Caroline Kennedy, daughter of former President John F. Kennedy, warned senators of her “predator” cousin ahead of his first confirmation hearing on Wednesday. In a letter first reported by The Washington Post, she wrote that his victims included family members and parents of sick children.

Over many years, Kennedy has been clear about his beliefs on vaccines in dozens of interviews, podcasts and social media posts.

Robert F. Kennedy Jr. explains why his voice sounds raspy and strained, causing difficulty when he speaks. Here's more about spasmodic dyshphonia

If approved, Kennedy will control a $1.7 trillion agency that oversees food and hospital inspections, hundreds of health clinics, vaccine recommendations, and health insurance for roughly half the country.

The hearing, which began at 10 a.m., will examine the worthiness of RFK Jr. to be Secretary of Health and Human Services. Watch the RFK Jr. confirmation hearing live on C-SPAN (Optimum channel 80, Spectrum channel 49).

As Robert F. Kennedy Jr. faces his Senate confirmation hearings to lead the HHS, here's where he stands on health issues including vaccines and food dyes.