text:  Former President Donald Trump has named Ohio Senator J.D. Vance as his running mate. The news comes on the first day of the Republican National Convention in Milwaukee. And as Trump looks to cement a lasting legacy within the party, NPR's Stephen Fowler is at the convention and joins us now. Hey, Stephen. Hey there. So Republicans have officially picked Donald Trump as their presidential nominee and J.D. Vance as the vice presidential nominee. Tell us just what do we know about Vance?