Robert F. Kennedy Jr. faced more than three hours of questions during a confirmation hearing to become health secretary.

Robert F. Kennedy's nomination will put Republican lawmakers' loyalty to the test, as the former Democrat holds a range of unorthodox positions that could alienate both conservatives and liberals.

In a confirmation hearing for his nomination to head the $1.7 trillion Department of Health and Human Services, Robert F. Kennedy Jr. confused two of the massive healthcare programs he would be overseeing as secretary — Medicare and Medicaid — and insisted he was not anti-vaccine.

Follow along today for ongoing coverage of Robert F. Kennedy Jr.'s second Senate confirmation hearing.  | Coverage of Robert F Kennedy Jr.'s second Senate confirmation hearing.

If confirmed as health secretary, Robert F. Kennedy Jr. would oversee the Food and Drug Administration and other agencies that issue key decisions for drug companies.

Robert F. Kennedy Jr., President Donald Trump's HHS secretary nominee, will say he's not "anti-vaccine" on Wednesday, the first of two straight days of Senate confirmation hearings.

Robert F. Kennedy Jr.’s frequent questioning of the safety of childhood vaccinations over the years is persisting as an issue in his confirmation hearings to become the Trump administration's top health official.

WASHINGTON — Robert F. Kennedy Jr.'s anti-vaccine advocacy is outside the mainstream. His previous statements on abortion could alienate Republicans. But a new poll finds that not all of his controversial health goals are unpopular — in fact, at least one has broad support among Democrats and Republicans.

“The comment that [Kennedy] made about the vaccine schedule, it’s basically scientific racism, which has been debunked,” Dr. Oni Blackstock , a primary care and HIV physician who is the founder and executive director of Health Justice , a racial and health equity consulting company, told HuffPost.

As secretary of the HHS, Kennedy would oversee major health agencies, including the Food and Drug Administration (FDA), the Centers for Medicare and Medicaid Services (CMS), the Centers for Disease Control (CDC),

Robert F. Kennedy Jr.’s confirmation hearings made clear that he is unqualified to be HHS secretary even beyond his positions on vaccines, writes Dr. Georges C. Benjamin, executive director of the American Public Health Association.