 Ohio Senator J.D. Vance is officially the heir apparent to the MAGA movement. He debuted last evening as Donald Trump's vice presidential nominee at the Republican National Convention in Milwaukee. The 39-year-old political newcomer, author of the best-selling book Hillbilly Elegy, told delegates how he was raised largely by his maternal grandparents after his mother struggled for years with addiction and his father abandoned them when he was young.