The initial read on the vice presidential debate was that the normally gaffe-prone Joe Biden escaped the 90-minute exchange without a forced error. On closer inspection, it appears that he may have had at least one potentially troublesome misstep. When moderator Martha Raddatz questioned him about the unanswered plea for an enhanced security presence at the Benghazi consulate, Biden responded, “we weren't told they wanted more security there.” His response, if it is to believed (big if), effectively shifts blame away from the White House—and toward the State Department. On Friday, Press Secretary Jay Carney found himself in the unenviable...