 Radio Iowa, I'm Dar Danielson. In other news, 27-year-old Joe Mitchell of Des Moines is the youngest Iowa delegate at the Republican National Convention. Mitchell is a former state legislator who took office at the age of 21. Mitchell says GOP Vice President nominee J.D. Vance, who is 39, will appeal to younger voters. Senator Vance is clearly incredibly talented. Growing up with a single mom, working class, you know, Rust Belt.