 It's hard to reimagine someone as Hitler and end up in their good graces, let alone potentially become the person they choose to help lead the country. But Ohio State Senator J.D. Vance's shifting position on Donald Trump over the years, from one-time critic of the former president to staunch ally, is a metamorphosis shared by many of Trump's potential running mates. It's not unheard of for a running mate to move beyond past disagreements with a presidential candidate, but the shift is more striking for Trump's potential running mates.