The first-term senator may have little choice: 12 percent of Republican voters in North Carolina indicated in a New York Times-Siena College poll last week that they were undecided in the Senate race, about twice the share of Democrats who were uncertain about Tillis’ lesser-known Democratic rival, Cal Cunningham. The former vice president owes his opportunity in North Carolina to the state’s fast-changing demography and to the fact that the transplants moving to the state’s booming suburbs share the same misgivings about Trump as their cul-de-sac counterparts across the country. Notably – and unlike some past candidates in a state that is more amenable to electing Democratic governors than Democratic presidents – he said he would happily appear with Biden in North Carolina.