Health Secretary Robert F. Kennedy Jr. remains defiant regarding his controversial public health policies. During a Senate Finance Committee hearing, he repeatedly clashed with senators, accusing some of dishonesty. Kennedy defended the recent firing of CDC Director Susan Monarez, claiming Monarez had lied and that the agency's actions were necessary due to the nation's poor health status. He also justified removing seventeen members from the CDC's vaccine advisory panel, asserting he was depoliticizing it. Kennedy suggested that medical organizations opposing him were compromised by pharmaceutical funding. Republican Senator John Barrasso expressed grave concerns that Kennedy's stances on vaccines could endanger public safety and reverse medical progress. Barrasso specifically cited concerns about measles outbreaks and the CDC director's dismissal. Some Republican senators attempted to create a rift between Kennedy and President Trump by highlighting Trump's past support for vaccine development initiatives. Senator Bill Cassidy contrasted Trump's Operation Warp Speed with Kennedy's decision to cancel vaccine development grants. Cassidy argued that Kennedy's actions effectively limited vaccine access, leading to confusion and difficulties in obtaining COVID-19 boosters. Senators also worried that upcoming CDC vaccine advisor discussions could further restrict recommendations for various diseases, although Kennedy indicated measles vaccine recommendations would likely remain unchanged.