Writing that Kamala Harris and her campaign “must do more” to win over support from undecided voters, a New York Times columnist argued Wednesday that the vice president’s road to electoral victory begins with engaging directly with what he refers to as the “final 5%.” “Harris has run a remarkable race, one truncated by the historic route by which she became her party’s nominee,” Charles Blow wrote in a new op-ed Wednesday. “But now she must finish it in the way many longer campaigns begin: by prioritizing retail politics that win over the reluctant.” While Harris, Blow writes, is “a must-win …