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.

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

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.

During confirmation hearings, Robert F. Kennedy Jr., Kash Patel and Tulsi Gabbard faced tough senate scrutiny on their controversial pasts.

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

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

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

Democrats harshly criticized President Donald Trump for a news conference Thursday in which he said that his predecessors and diversity were to blame for Wednesday night’s fatal collision of an Army helicopter and an American Airlines passenger plane landing at Ronald Reagan National Airport.

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).

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

President Donald Trump nominated Robert F. Kennedy Jr. to lead the Department of Health and Human Services on Nov.

As the U.S. Senate confirmation hearings continue for President Donald Trump’s Cabinet picks, PolitiFact is live fact-checking the hearings for FBI