Anthony Carbonetti has heard the conventional wisdom a million times. Republican primary voters may say they like Rudy Giuliani now, that wisdom goes, but once they learn his positions on abortion, gay marriage, and guns, they’ll abandon the former New York mayor in a heartbeat. Carbonetti, Giuliani’s long-time right-hand man — he was the mayor’s chief of staff from 1999 to 2001 — doesn’t buy it. ”Why do you think they don’t know?” he asks, referring to those conservative voters for whom abortion, or marriage, or guns are overwhelmingly important issues. “I’m of the impression that people do know. If...