Put on the spot, a lot of Americans might hesitate over the difference between Medicaid and Medicare. People who aren’t affected by one of these programs, which together enroll about 150 million people in the U.

Senators grilled Robert F. Kennedy Jr. on if and how he would reform Medicaid and Medicare during his first confirmation hearing to become the next secretary of Health and Human Services.

Robert F. Kennedy Jr., Trump’s nominee to lead HHS, stumbled multiple times during his first Senate confirmation hearing when asked about Medicaid.