Sen. J.D. Vance, R-Ohio, on Thursday took to Twitter to angrily defend Robert F. Kennedy Jr. after a Senate hearing in which Kennedy was repeatedly questioned about past statements on vaccines, using a profanity to describe his colleagues’ line of questioning.
“When I see all these senators trying to lecture and 'gotcha' Bobby Kennedy today all I can think is: You all support off-label, untested, and irreversible hormonal 'therapies' for children, mutilating our kids and enriching big pharma. You're full of shit and everyone knows it,” Vance wrote on his verified account, @JDVance.
The outburst followed a hearing in which Kennedy, a well‑known vaccine skeptic, was pressed by senators about apparent contradictions in his public statements. Sen. Bill Cassidy, R‑La., who is also a physician, and Sen. Bernie Sanders, I‑Vt., asked Kennedy why he would praise President Donald Trump for Operation Warp Speed while criticizing vaccines developed under that initiative and supporting policies that, critics say, could reduce access to them.
Kennedy sought to clarify his remarks during the session but was repeatedly challenged about earlier assertions that public health officials and vaccine manufacturers have overstated vaccine safety and efficacy. The exchanges prompted sharp questioning from lawmakers across the aisle and drew attention on social media, where Vance’s response became a focal point.
Vance, who was elected to the Senate in 2022, framed his Twitter post as a defense of Kennedy’s treatment at the hearing and as a rebuke of other senators’ priorities. His post echoed broader conservative critiques that some public officials prioritize pharmaceutical industry interests and controversial medical treatments for minors. The tweet drew swift reaction online, including criticism and support, and prompted some confusion in replies about whom Vance was addressing.
Kennedy has long been a polarizing figure in debates over vaccines and public health policy. Lawmakers during the hearing noted instances in which his public statements appeared inconsistent, particularly regarding his characterization of Operation Warp Speed and his stance on vaccine availability. Cassidy and Sanders directly asked how those positions aligned, pressing Kennedy for clear answers.
The exchange is part of an ongoing, often heated national debate about vaccine policy, public health messaging and the role of medical interventions in children’s care. Senators from both parties have increasingly confronted high‑profile skeptics and advocates at public hearings as the issues remain politically and medically contentious.
Vance’s tweet adds to a series of partisan social media commentaries that have followed recent congressional and public testimony by figures who challenge mainstream public health positions. The post will likely figure in continued discussions about the hearing and the broader dynamics between elected officials, public health experts and high‑profile critics.
The hearing transcript and video remain available from the Senate for further review. Vance’s tweet was posted on Sept. 4, 2025, and was captured and reported by multiple outlets following the hearing.