Article continues below advertisementMegyn Kelly has no doubt that Olivia Nuzzi had an affair with Robert F. Kennedy Jr.Speaking about Nuzzi's upcoming memoir during the Monday, November 18, episode of her podcast, the conservative podcaster said she buys the 32-year-old political reporter's claims "entirely." "It's so detailed like, she has to be a true lunatic to say all this," Kelly, 55, declared. "Because she would get sued so quickly for defamation, and if he were innocent, he would sue her."Article continues below advertisementMegyn Kelly Says RFK Jr.