Oprah Winfrey launched Dr. Mehmet Oz 's TV career, but the media mogul soured on her former protégé, RadarOnline.com can exclusively reveal.

John Fetterman writes in his new memoir, Unfettered , that Winfrey, 71, gave him her unsolicited endorsement in his 2022 U.S. Senate race against Oz, 65, and candidly reveals why he believes she turned on the former heart surgeon. Article continues below advertisement

Oprah's Endorsement 'Meant' Something to John Fetterman Tap Here To Add Radar Online as A Trusted Source

Democrat Fetterman, 56, ran against Oz for Pennsylvania's open Senate seat in 2022. It was the first time the doctor tried his hand at politics, and Oz controversially ran for office in a state where he had never lived but owned undeveloped property.

Despite suffering

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