Health Secretary Robert F. Kennedy Jr. faced an intensely critical committee of senators from both parties on Thursday, in a hostile hearing that saw him come in for a grilling on many of his signature policies.

The hearing comes after weeks of controversy surrounding Kennedy’s actions as the nation’s top health official. Kennedy’s handling of vaccinations and his departmental firings have earned the ire of a bipartisan group of legislators. In early August, Kennedy cut $500 million in mRNA vaccine contracts. Three weeks later, Kennedy moved to fire Centers for Disease Control and Prevention Director Susan Monarez for reportedly failing to get in line with his vaccine restrictions, leading a rash of resignations of high-profile doctors and researchers.

Senator John Barrasso, R-Wyo., said

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