MANCHESTER, N.H. — Mitt Romney has never looked stronger than he does today. He’s built up a huge lead in New Hampshire. The famously flat line of his support in Gallup polling is trending upwards. And, in South Carolina – SOUTH CAROLINA – the former Massachusetts Governor is leading the pack with almost 40 percent of the vote, while the only southerner in the contest – Texas Gov. Rick Perry – has fallen to 5 percent. It’s remarkable what an 8-vote victory over an underfunded and unknown candidate in Iowa can do to momentum. The only question now: can anyone...