MANCHESTER, NH – Rick Perry’s Granite State headquarters has the feel of a typical campaign office: Red, white, and blue “Perry – President” placards line the walls, young staffers tap away incessantly on keyboards and Blackberries, and dry erase boards are crowded with maps of the state, important dates, and key endorsements. The Texas Governor may have just sustained a series of extraordinary blows in national polling, but you wouldn’t know it from the demeanor of his staffers. The fight goes on, even in rival Mitt Romney’s regional backyard. Unsurprisingly, several staffers I spoke with are upbeat about Perry’s latest...