The setting wasn’t dazzling—like many campaign offices, it’s in a dingy old building available for a short-term lease—but it’s one of 29 field offices for Kamala Harris’s campaign across the state, and its existence is a sign of a new Democratic strategy: the idea that by pouring energy into red counties, they can turn out a previously untapped vein of Democratic voters, and win the Old North State for the first time in 16 years. In North Carolina, she won nearly a quarter of the GOP primary vote, including 25.2 percent in Union County, 24.1 percent in Cabarrus County, and 21.1 percent in Gaston County.