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.

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

Sen. Bill Cassidy, the top Republican on the Senate Committee on Health, Education, Labor and Pensions, concluded Thursday's hearing by saying he was "struggling" with the nomination due to Kennedy's vaccine positions. Kennedy notably refused to say vaccines don't cause autism as he faced pointed question from lawmakers.

Robert F. Kennedy Jr. has said vaccines are not safe. His support for abortion access has made conservatives uncomfortable.

What experts on John F. Kennedy, Martin Luther King Jr and Bobby Kennedy assassinations hope to learn from files expected to be declassified

If confirmed by the Senate, Kennedy would head the Department of Health and Human Services (HHS), which oversees many of the country’s health agencies, from the Food and Drug Administration (FDA) to the Centers for Disease Control and Prevention (CDC).

Kyra Kennedy, 29, is the youngest daughter of health secretary nominee Robert F. Kennedy Jr.

PolitiFact is live fact-checking the confirmation hearings for Robert F. Kennedy Jr. and Kash Patel, two of President Donald Trump's Cabinet picks.

Cassidy is expected to challenge RFK Jr. on his vaccine skepticism and views on public health in today's confirmation hearing.

Kathleen "Kick" Kennedy is the eldest daughter of Robert F. Kennedy Jr., who could be confirmed as health secretary in Trump's administration.

The Trump administration’s purge of dozens of senior officials at the U.S. Agency for International Development encountered resistance Thursday when the career employee who carried out the original directive rescinded it, calling the purge an “illegal” violation of “due process.”