Sen. J.D. Vance (R-OH) is rocketing toward the top of Donald Trump’s shortlist for running mates, and a political insider explained why the freshman senator could be his choice. The Ohio Republican sat down recently with New York Times columnist Ross Douthat to discuss class struggle, the war in Ukraine, Vance’s book “Hillbilly Elegy” and the legitimacy of the 2020 election, and The Bulwark’s White House correspondent Andrew Egger was disgusted by his response. “He’s easily the most gifted and most enthusiastic s–t-shoveler on the shortlist,” Egger wrote. Want more breaking political news? Cl…