It is safe to say that no other Republican on the campaign trail this year — or ever — has begun a speech with the phrase “Awww, shucky ducky!” the way Herman Cain did this year to the utter delight of his audience, which responded with wild applause. snip And while his casual style of racially inflected humor works to ingratiate him with mostly white audiences at campaign rallies, it has angered some black critics, who believe he uses age-old stereotypes. He has no qualms, for instance, about playing off black clichés: should he become president, his Secret Service codename...