Viewed in isolation, Mitt Romney's 2012 presidential candidacy is doomed. In 2008, Romney earned himself a reputation as a flip-flopper as he dramatically attempted to reshape himself as a stanch conservative despite having previously staked out liberal positions on abortion, guns, immigration and a litany of other issues. This time around, Romney faces the additional burden of trying to explain away his most significant legislative accomplishment as governor of Massachusetts -- a big government health care plan that was a model for ObamaCare. In his last presidential bid he was largely able to get a pass, because health care wasn't...