The latest allegation swirling around businessman Herman Cain — that he conducted a 13-year long extramarital affair with a woman named Ginger White — could well amount to a political death blow for his already-reeling presidential campaign. And that’s bad news for former Massachusetts governor Mitt Romney. ...Romney’s best (only?) path to the nomination is if conservatives, who seem to have decided they won’t be with him, fracture among several candidates rather than unify behind a single one. That reality is true on the national level but equally true in early voting states like Iowa and South Carolina where Romney...