Obama's weakness is that he just doesn't have the experience that most candidates have when running for President. That has always been both his Achilles' heel and a real strength, depending on what type of voter you ask. Those seeking a strong hand for stormy waters want a captain with a lot of experience. Those wanting a complete change of course are drawn to the new and fresh candidate.

Clinton was able, with a phrase, to define Obama. She said he was "naive on foreign policy." And since Obama has done a poor job of defining himself, that struck home with voters and suddenly Obama found himself on the defensive for his new approach to foreign policy, when that is exactly what the electorate seems to want. In my opinion he made two mistakes with his "rebuttal" when he declared that Clinton was Bush-Cheney light. The first is that it is virtually everyone knows that is ridiculous to the point of absurd. The second is that Obama pledged to run a new kind of campaign and negative attacks on another candidate are not "new" and may turn off the high level of grassroots support he has garnered from people that are growing cynical about politics.