One or more Republican lawmakers will appear to publicly waver on their commitment to the pledge. (Norquist points to Chambliss, Graham and King as repeat offenders.) That open questioning is often followed just as predictably by a private call to Norquist -- who says Chambliss has called to apologize -- and more often than not, some kind of public mea culpa.
CNN: Norquist's no-tax pledge has survived challenges before