 Vance, who was in the Marine Corps and served in the Iraq War, also shared stories of patriotism, service and sacrifice. And Donald Trump Jr. also spoke last night, praising his father and saying he considers J.D. Vance a friend who will fight for the country. Look at me and my friend J.D. Vance, a kid from Appalachia and a kid from Trump Tower in Manhattan. We grew up worlds apart.