Newt Gingrich, with wife Callista, speaks at the airport of Lake in the Hills, Ill., Thursday. The former House speaker sounds less hawkish on foreign-policy matters. "Instability rather than aggression is the great threat," he recently said of North Korea. (Associated Press)

Newt Gingrich, with wife Callista, speaks at the airport of Lake in the Hills, Ill., Thursday. The former House speaker sounds less hawkish on foreign-policy matters. "Instability rather than aggression is the great threat," he recently said of North Korea. (Associated Press)