U.S. Senator Bill Cassidy questioned President Trump's nominee for assistant secretary for preparedness and response during a Senate hearing on Tuesday. The exchange focused on a since-deleted social media post regarding the hepatitis B vaccine.

Cassidy, a Republican senator from Louisiana who holds a Medical Doctor degree, challenged the nominee over the content of the online post, which was no longer available at the time of the hearing. The senator addressed the matter directly during the confirmation proceedings.

"Why would you repeat those damn lies? That destroys trust," Cassidy said. The comment contained profanity and reflected the senator's criticism of the nominee's past statements.

Cassidy used his medical background to inform his line of questioning during the session. The hearing served as a forum for senators to evaluate the qualifications of the presidential appointee.

The confirmation process for the assistant secretary for preparedness and response involves scrutiny of the nominee's public record and positions on health matters. Cassidy's intervention showed concerns about misinformation and its impact on public trust in medical guidance. The deletion of the social media post prior to the hearing indicated that the content remained a point of contention during the evaluation of the candidate. This role oversees federal efforts in health emergencies and preparedness initiatives.