After receiving local and national publicity as one of several Iraq war veterans running for Congress this year, North Carolina Democrat Tim Dunn in late March suddenly dropped his challenge to 8th District Republican Rep. Robin Hayes. Dunn’s unexpected move was a boost for fellow Democrat Larry Kissell, a social studies teacher who in an instant went from little-noticed longshot to front-runner for the party’s nomination. Fundraising accelerated. Consultants and a pollster were hired. A media strategy was crafted. But Dunn’s dropout was even better news for Hayes, whose chances for winning a fifth term in the potentially competitive 8th...