Robert F. Kennedy Jr., nominee for HHS secretary, seemed unfamiliar with the massive insurance program during Thursday’s hearing, mistakenly saying Medicare Part A mainly paid for primary care or physicians.

Kennedy Jr.'s statements before the Senate Finance Committee on Wednesday revealed a concerning lack of knowledge about the major health programs he'd oversee, should he be confirmed as HHS secretary.

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.