Here's Obama's second national TV ad, which, like the last one, will air in 18 states (although unlike the last one, it's only 30 seconds long, not a minute).

It's Obama's pitch to blue-collar workers and conservative Democrats. He says he's offering job creation, health care, tax cuts for "workers." Perhaps most notably, this spot delivers the message that Obama is also a worker.

UPDATE: Ambinder points out that the claims in the ad about Obama's welfare-to-work qualifications are a bit on the overblown side.