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Robert Kennedy Jr Bill Cassidy clash over vaccines, NIH and Medicaid

Robert Kennedy Jr Bill Cassidy marked a bruising week of hearings over vaccines, Medicaid, NIH funding, fraud prevention and drug pricing.

RFK Jr. out for revenge against skeptical senator
RFK Jr. out for revenge against skeptical senator

spent this week in front of four congressional committees, bringing the total to seven HHS budget hearings since April 16, 2026, as lawmakers pressed him on vaccines, Medicaid, drug pricing and the department’s plans for the next fiscal year. The hearings underscored how broad the fight over the Health and Human Services budget has become, with Democrats and Republicans finding rare overlap on one point: keep the funded.

Kennedy’s testimony focused on chronic diseases, most-favored nation drug pricing and nutrition, but the sharper exchanges came on the political fault lines that now define the department. Democrats criticized his response to the measles outbreak, his stance on vaccines, large-scale cuts to Medicaid and the proposed elimination of programs at HHS. They also raised concerns about his comments on abortion access and cuts to research funding for specific populations. Republicans, meanwhile, highlighted efforts to prevent fraud, make the United States healthier and increase transparency, while voicing support for his promotion of unprocessed foods.

The hearings are part of the administration’s , and the arguments on display were about more than line items. Republicans pushed for a stronger stance on abortion, backed the Rural Health Transformation Program and warned that social media can harm youth mental health. They also urged Kennedy to find ways to improve program integrity in the 340B program and pressed for the to have enough resources to move innovative treatments to market efficiently. Democrats, for their part, said budget and staffing cuts to inspectors general have weakened Medicare fraud prevention.

The turned separately to Medicare fraud, where Republicans called for moving beyond the pay-and-chase model by modernizing CMS fraud detection with advanced data analytics and artificial intelligence, along with tighter eligibility verification before payments are made. On the same day, the released a report on CMS’s use of data analytics on claims in traditional Medicare to identify patterns that may indicate fraud. The timing gave both parties fresh evidence for a familiar argument: Kennedy’s budget pitch will be judged not just on what it promises, but on whether Congress believes HHS can still police its own programs while carrying out its broader health agenda.

That is where the political balance now sits. criticized Kennedy’s negative statements about the work of the US Preventative Services Task Force, Chair criticized his stance on vaccines, and both parties still urged him to continue funding the NIH. The result is a budget fight with a narrow center and a lot of friction on the edges, and Kennedy has made clear that the next round will be fought over whether HHS can cut waste without cutting away the programs lawmakers still want protected.

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