Federal officials said a psychoactive ingredient in kratom had been refined and added to supplements that could quickly become addictive.

Democrats on the U.S. Senate's health committee launched an investigation on Tuesday into Health Secretary Robert F. Kennedy Jr.'s firing of all members of a Centers for Disease Control and Prevention panel of vaccine experts.

Louisiana Republican Sen. John Kennedy commented on the quadruple murder at a New York City high-rise office building on Monday. "We don't need more gun control. We need more idiot control," Kennedy told FNC's Sean Hannity.

La., dismisses demands for stricter gun control laws and declares there is 'absolutely no excuse' for the shooting in Manhattan on 'Hannity.'

Joe Kennedy III, the grandson of Senator Robert F. Kennedy, says there is work to do in red states. He also has a few things to say about his uncle, Robert F. Kennedy Jr.

Deputy Attorney General Todd Blanche and Health/Human Services Secretary Robert F. Kennedy Jr give a press conference on new efforts to tackle the opioid crisis.

Author J. Randy Taraborrelli examines Jackie Kennedy's specific worries about Marilyn Monroe and reveals JFK's accountability for his marital behavior before his assassination.

U.S. Health Secretary Robert F. Kennedy Jr. should not fire an advisory panel that determines what cancer screenings and other preventive health measures insurers must cover, an influential doctors' group said on Sunday.