THERE IS, it seems evident, more than enough blame to go around in the botched handling of the botched Christmas bombing. Not for some Republicans. With former vice president Richard B. Cheney in the lead, they have embarked on an ugly course to use the incident to inflict maximum political damage on President Obama. That's bad enough, but their scurrilous line of attack is even worse. The claim that the incident shows the president's fecklessness in the war on terror is unfounded -- no matter how often it is repeated.