Sen. Bill Cassidy, chair of the Senate HELP Committee, has voiced strong concerns about Heidi Overton’s nomination, citing her limited managerial experience and role in a recent White House executive order on childhood vaccines. Overton, a White House domestic policy aide nominated by President Trump in August 2026, testified before the committee on September 24, affirming the safety of approved vaccines including MMR and mifepristone while noting no evidence linking Tylenol use in pregnancy to autism. A committee vote has not been scheduled, and the full Senate reconvenes November 9 after recess. With Republicans holding a narrow majority, Cassidy’s support or opposition could determine whether the nomination advances amid questions over agency leadership stability following the prior commissioner’s resignation.