 With Lee Greenwood singing Proud to be an American in person on the stage, Donald Trump took his seat in the stands next to his new running mate, Ohio Senator and Trump critic turned ally J.D. Vance. ABC's Rachel Scott has more from Milwaukee. Donald Trump officially becoming the Republican presidential nominee for the third time. His sons Eric and Don Jr. and daughter Tiffany representing Florida, putting him over the top in the roll call of states.