The United States cannot afford to take any risks. President Obama, and his family, must live in a bubble all their days in office. Handshaking, baby-kissing and plunging into crowds must be forbidden.
Greenspan, like so many in Washington, lived in a bubble and was completely disconnected from the activities of real humans. Greenspan's reliance on statistics and flow charts was just not telling him the truth.
What Obama's campaign does that is different is to ask canvassers and callers to personally take a stake in making a difference in the leanings of voters. Quite simply it is predicated on the very questionable statistical significance of one human influencing another.
I don't want someone who believes their biggest asset is that they know what it's like to shop at WalMart and take their kids to hockey practice in a mini-van. How will that help in negotiations and diplomatic missions with other heads of state?
You may be shocked to learn that not all stories from the convention were about tactics, or personalities, or disunity, or overcoming disunity, or yet more endless parsing of personalities and stagecraft.