Senate Minority Leader Mitch McConnell gave a stern warning to Robert F. Kennedy Jr. after a report highlighted how one of Kennedy's associates had sought to rescind approval for a polio vaccine.

McConnell, a polio survivor, said in a statement that "efforts to undermine public confidence in proven cures are not just uninformed – they’re dangerous." 

"Anyone seeking the Senate’s consent to serve in the incoming Administration would do well to steer clear of even the appearance of association with such efforts," he added, without naming Kennedy, a vaccine skeptic who is President-elect Trump's choice to lead the Department of Health and Human Services. 

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McConnell's statement follows a New York Times report on Friday that highlighted how Kennedy's personal attorney, Aaron Siri, had represented clients in cases that sought to rescind approval for a version of the polio vaccine and others. 

"Like millions of families before them, my parents knew the pain and fear of watching their child struggle with the life-altering diagnosis of polio. From the age of two, normal life without paralysis was only possible for me because of the miraculous combination of modern medicine and a mother’s love. But for millions who came after me, the real miracle was the saving power of the polio vaccine," McConnell said.

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"For decades, I have been proud to work with devoted advocates – from Rotary International to the Gates Foundation – and use my platform in public life to champion the pursuit of cures for further generations. I have never flinched from confronting specious disinformation that threatens the advance of lifesaving medical progress, and I will not today. 

The GOP leader was joined by his Democratic counterpart, Senate Majority Leader Chuck Schumer, who demanded that RFK Jr. make his position on the polio vaccine clear.

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"This would undoubtedly make America sick again," Schumer said, sharing the Times report on X. "It’s outrageous and dangerous for people in the Trump Transition to try and get rid of the polio vaccine that has virtually eradicated polio in America and saved millions of lives. RFK Jr. must state his position on this." 

Reached for comment, a Trump transition team spokesperson said, "Mr. Kennedy believes the Polio Vaccine should be available to the public and thoroughly and properly studied."