In short, the Democrat candidate admitted to an extramarital affair, but since that revelation, the numbers haven’t really budged. Cal Cunningham is still ahead in the polls by a slim margin, if not doing somewhat better since the scandal broke. It seems like most voters who support him are fine with letting this be a private issue — let him deal with it; we support his public policies — while the incumbent Republican, Thom Tillis, is a Trump-loving existential threat to the nation. It’s not like any significant number of people in a purple state are suddenly switching sides to re-elect a Republican in 2020.