Great ad, “Zero,” released by Barack Obama’s campaign less than 12 hours after the presidential debate:

The Democratic political blogs seemed to think Obama’s best moment of the debate was when he pounded John McCain on being wrong about Iraq.

I liked that clip, but I think this ad is very smart, because the economy is a bigger issue for most voters than Iraq.

At fivethirtyeight.com, Nate Silver analyzes last night’s snap polls and explains why the snap polls and focus groups showed an advantage to Obama:

TPM has the internals of the CNN poll of debate-watchers, which had Obama winning overall by a margin of 51-38. The poll suggests that Obama is opening up a gap on connectedness, while closing a gap on readiness.

Specifically, by a 62-32 margin, voters thought that Obama was “more in touch with the needs and problems of people like you”. This is a gap that has no doubt grown because of the financial crisis of recent days. But it also grew because Obama was actually speaking to middle class voters. Per the transcript, McCain never once mentioned the phrase “middle class” (Obama did so three times). And Obama’s eye contact was directly with the camera, i.e. the voters at home. McCain seemed to be speaking literally to the people in the room in Mississippi, but figuratively to the punditry. It is no surprise that a small majority of pundits seemed to have thought that McCain won, even when the polls indicated otherwise; the pundits were his target audience.

[…]

McCain’s essential problem is that his fundamental strength – his experience — is specifically not viewed by voters as carrying over to the economy. And the economy is pretty much all that voters care about these days.

EDIT: The CBS poll of undecideds has more confirmatory detail. Obama went from a +18 on “understanding your needs and problems” before the debate to a +56 (!) afterward. And he went from a -9 on “prepared to be president” to a +21.

Click the link, because Silver’s piece is worth your time.

Speaking of the pundits who were McCain’s target audience, the Des Moines Register’s David Yepsen thought McCain won the debate.