Ohio Sen. JD Vance could potentially be the future face of the Republican Party.Chip Somodevilla/Getty ImagesSen. JD Vance had a lot to prove during his vice-presidential debate with Minnesota Gov. Tim Walz.Vance has struggled with key voting blocs in recent months. But he's excelling among Republicans.The Ohioan seems to be positioning himself a the GOP heir apparent in 2028.Ohio Sen.