And Kennedy's former running mate, Nicole Shanahan, has also come out against Means' nomination. Will Stone: So much of this position is about messaging.

Health and Human Services Secretary Robert F. Kennedy Jr., left, speaks as President Donald Trump listens during an event in the Roosevelt Room at the White House, Monday, May 12, 2025, in Washington.

Dr. Janette Nesheiwat withdrew her nomination for Surgeon General after questions about her credentials. Dr. Casey Means has a medical degree from Stanford and a best-selling book on metabolic health.

Dr. Casey Means at the confirmation hearing for Robert F. Kennedy Jr. for Secretary of Health and Human Services, at the U.S. Capitol on Jan. 29, 2025. AP Photo/Ben Curtis ...