[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2010/images/05/11/art.bospecterad0511.yt.jpg caption="Sen. Specter's new ad features the president as he praises the former Republican."]
(CNN) – President Obama has a starring role in Sen. Arlen Specter's new television ad.
The new 30-second spot begins airing Tuesday on broadcast and cable outlets across Pennsylvania, Specter campaign manager Christopher Nicholas told CNN.
The ad's footage is borrowed from a joint Obama-Specter event held after former Republican switched parties last year - in part to increase his re-election prospects.
"He came to fight for the working men and women of Pennsylvania," Obama says of Specter in the spot. "And Arlen Specter cast the deciding vote in favor of the Recovery Act that has helped pull us back from the brink," the president notes in a reference to his administration's economic stimulus package.
"I love you," Obama tells the gathered crowd in the footage, "and I love Arlen Specter."
Specter finds himself in an increasingly contentious Democratic primary fight against Rep. Joe Sestak. A recent survey showed that Specter's once formidable lead is shrinking in advance of next week's primary.