 There is no information suggesting, however, that this threat is connected to the attempted assassination by a 20-year-old shooter. Republicans are buzzing in Milwaukee. Former Speaker of the House and California delegate Kevin McCarthy thinks Ohio Senator J.D. Vance, author of the best-selling Hillbilly Elegy, will help Donald Trump win key battleground states in the Midwest. I thought he tapped into an American issue that a lot of people had not seen, the forgotten Midwest. Vance would be the youngest vice president since Richard Nixon. Doug Sovereign for CBS News, Milwaukee.