Backstage can be something of an inner sanctum at a presidential debate: even though they are appearing on live television before millions of Americans, the candidates are used to having their clubhouse hermetically sealed from the public before and after they take the stage. That was not the case for the six major Republican candidates who participated in the Fox News Channel forum on Saturday night when the network invited a New York Times reporter to roam behind the scenes as they took turns before a panel of conservative state attorneys general and the Fox News host Mike Huckabee. How...