Dr. Marty Makary, the F.D.A. commissioner, has faced intense criticism as the agency undergoes top-level turnover in critical areas like drug approvals.
Health Secretary Robert F. Kennedy Jr., with President Trump and Mehmet Oz, the Medicaid and Medicare services administrator, in the White House in September.
Readers respond to an Opinion guest essay about the justices and unitary executive theory. Also: The danger posed by Health Secretary Robert F. Kennedy Jr.