J.D. Vance has been one of the least popular vice presidential picks in recent memory, and he’s got a chance to sink even lower with a disastrous showing in the upcoming debate with Tim Walz, a columnist wrote Tuesday. The Ohio Republican seemingly loses his cool with strong women interrogators, and with the Oct. 1 debate set to be moderated by CBS News correspondents Norah O’Donnell and Margaret Brennan, the Washington Post’s Jennifer Rubin argued that Vance might be better off skipping that face-off with Kamala Harris’ running mate. “Vance’s role in fanning what amounts to a racist blood lib…