sentences:  A fan of Jimmy Carter (much to Jack's bemusement), Milton is writing a multi-volume biography of the former President, entitled "From Peanut to President"; Betty White is reading a volume when Tracy Jordan telephones her in "Stone Mountain".Jack discovers in "The Natural Order" that Jimmy Donaghy had been gone when Jack was conceived.He and Lenny Wozniak narrow his possible fathers down to three men whom Jack lures to Manhattan under false pretences in "Mamma Mia".