Obama hits the airwaves with a new ad starring Pennsylvania Senator Bob Casey that appears designed to reassure the economically struggling voters that were the subject of Obama's "small town" remarks.

The ad features Casey walking against the backdrop of Scranton, and without making any mention of the "small town" brouhaha, Casey attests to Obama's grasp of the struggle such voters are enduring.

"In towns like yours and mine, families are struggling with bills they can't afford and jobs moving away," Casey says, concluding: "Barack Obama knows Pennsylvania's hurting."

Full script after the jump.

SCRIPT - "It Won't"

Senator Bob Casey: In towns like yours and mine, families are struggling with bills they can't afford and jobs moving away.

It has to change - but it won't until we change Washington.

That's why I believe in Barack Obama.

I've worked with him. I've seen him stand up to the lobbyists and special interests...

And like us, he's tired of the political games and division that stops anything from getting done.

Barack Obama knows Pennsylvania's hurting. He can unite America and bring real change.