Obama is capable - as evidenced by his first-term success with health care reform. But mandate-building requires humility, a trait not easily associated with him.

Movies such as 'Mr. Smith Goes to Washington' in 1939 to 'Dave' in 1993 portray Washington leaders as the ultimate Everymen - decent people just like you and me, only thrust onto greatness.

A presidential debate is a job interview. And voters look for certain traits in people applying to be president.

Political consultants are pugilists, masters in the dark art of negativity. Which is why it's surprising to hear Democrats such as Steve McMahon and Republicans like Rich Galen urging their presidential candidates to be more, well, positive.

One of Obama's most impressive attributes is his quiet confidence: Voters sense that he is comfortable in his own skin, a dedicated father and friend who won't waste time with the phony rituals of Washington.

This is Romney's biggest political weakness. His policy flip-flops and the general sense that he's not comfortable in his own skin leads voters, including many supporters, wondering about his core values.

Somebody must be up and somebody must be down. Trouble is, campaigns are messy, subtle creatures that don't follow convenient narratives.