Until Thursday, Wyoming U.S. Sen. John Barrasso, a physician and the Senate’s second-ranking Republican, had been silent on the implosion at the Centers for Disease Control and Prevention.

When CDC Director Susan Monarez was fired last week — less than a month after President Donald Trump had appointed her to lead the agency — and several CDC leaders subsequently resigned in protest, Barrasso remained mum.

Meanwhile, Louisiana Republican Sen. Bill Cassidy, also a physician and chair of the Senate’s health committee, quickly called for “oversight” of the “high-profile departures.”

Then on Thursday, Barrasso joined the fray when the Senate’s Finance Committee grilled Health and Human Services Secretary Robert F. Kennedy Jr. on his leadership and approach to vaccine policy.

“Secretary Ken

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