 It's going to be a Trump-Vance ticket. Former President Trump, posting on his Truth Social site, he selected the 39-year-old Ohio senator to be his running mate. More from ABC's Stephen Portnoy in Milwaukee. J.D. Vance came to national prominence when he wrote his memoir, Hillbilly Elegy. He was elected to the Senate in 2022. At age 39, the Ohio senator would be the third youngest vice president in history and the youngest since Richard Nixon.