Donald Trump’s now-widely criticized pick of Sen. J.D. Vance (R-OH) as his running mate was aimed to spearhead what will be a “principal strategy” of the Republican presidential campaign, a columnist suggested Monday. The choice has caused concern even among Republicans as the Ohio Republican has been badly bruised with the sharing of past interviews in which he shares many controversial opinions — including questioning if childless women should have a say in the running of the country. But Salon’s Amanda Marcotte wrote that, while these opinions worry some, they are exactly why Trump added Va…