President Obama just ripped into congressional Republicans for failing to resolve the debt crisis. He provided specific examples to persuade..effectively conjured up images of business honchos getting tax breaks on corporate jets .. but in doing so, Obama showed the risks in painting a vivid picture. CNBC immediately featured critics demanding to see just how much tax breaks on corporate jets contribute to the problem..probably a rounding error .. So focusing on the example as the whole problem made the president's whole argument less credible.