......One was born into a privileged family in a tony Michigan suburb; the other, onto a flat expanse of West Texas dirt with no indoor plumbing. One spent his youth tooling around his father’s car factory; the other, selling Bibles door-to-door so he could afford to buy a car. One excelled at Harvard University, simultaneously earning law and business degrees and swiftly climbing the corporate ladder; the other, his hope of becoming a veterinarian dashed when he flunked organic chemistry at Texas A&M University, joined the Air Force. [Perry graduated from A&M] Where Mitt Romney is obedient and cautious, Rick...