Another Obama ad in Pa.

On a day when his opponent was campaigning in the state, the presidential campaign of U.S. Sen. Barack Obama released its second ad of the general election. The advertisement, titled "Dignity," will air in Pennsylvania, among 18 other states, the campaign said today.

The brief spot reflects the campaign's continued efforts to introduce Obama, the presumptive Democratic nominee, and his life story to voters.  It opens by telling voters that after working his way through Harvard Law School, he "turned down big money offers, and helped lift neighborhoods stung by job loss."

Seeking to win over voters right of center, it emphasizes his accomplishments in moving people off welfare and into work, and his tax cuts for workers.

As president, the ad's narrator says, Obama will "never forget the dignity that comes with work."