Labor PAC runs anti-Romney ad in Pa.

The presidential campaigns are not advertising in Pennsylvania, but labor is.

Workers’ Voice, the super PAC associated with the AFL-CIO, launched a TV ad called “Economic Traitor” in the Pittsburgh market attacking Mitt Romney’s career at the Bain Capital private-equity firm.

It focuses on Bain’s investments in companies that move American jobs to China, and features a worker from a Sensata plant in Northern Illinois, telling of how Bain executives made the staff take down the U.S. flag when after the plant was sold to a Chinese company and the new owners visited.

 In addition to Pittsburgh, which covers parts of eastern Ohio, the ad will run in Youngstown, Ohio and Green Bay, Wisc., Workers’ Voice said.