(CNN) - A super PAC supporting President Barack Obama released its fifth television ad Thursday, again hitting presumptive GOP nominee Mitt Romney over his corporate background.
The group Priorities USA Action has repeatedly hammered Romney, who founded the private equity firm Bain Capital, as a greedy businessman who would put the interests of CEOs over those of middle class workers.
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Priorities' latest ad further carries that line.
"Romney bought companies, drowned them in debt. Many went bankrupt," says a male narrator in the spot. "But for every company he drove into the ground, Romney averaged a $92 million profit."
Obama's campaign has also been driving the Bain offense, most recently attacking Romney over a Washington Post report that detailed Bain as a strong proponent for outsourcing.
The new spot, "Briefcase," is part of a $10 million ad buy in May by Priorities, which includes their four previous ads. It's set to air in the battleground states of Colorado, Florida, Ohio, Pennsylvania and Virginia.
It closes with a line questioning whether Romney's business experience would make him a "good president," an argument he makes on the campaign trail.
"If [Mitt] Romney Wins, the middle class loses," the ad says, while showing a photo of Romney walking down a flight of jet stairs.
Reacting to previous attacks against his business record, the Romney campaign has pointed to the number of jobs created by Bain.
The firm has also responded in the past:
"Bain Capital's business model has always been to build great companies and improve their operations," the company has said in a statement. "We have helped the 350 companies in which we have invested, which include over 100 start-up businesses, produce $80 billion of revenue growth in the United States while growing their revenues well over twice as fast as both the S&P and the U.S. economy over the last 28 years."