 First of all, as young as he is, he's going to be everywhere, right? I mean, we have a very, very aggressive schedule for him. Vance is a former Marine and a venture capitalist who rose to fame for writing the memoir, Hillbilly Elegy. The campaign expects the Ohio senator will help Trump attract a wider coalition of voters, including younger voters and more of the working class. Franco Ordonez, NPR News, Milwaukee.