Tampa, Florida (CNN) - The Democratic super PAC Priorities USA said a new television spot, revealed Tuesday, was part of a new effort to cast Mitt Romney's policy proposals as bad for the middle class.
Previously, the group focused on Romney's time at Bain Capital, painting the Republican presidential candidate as a cold-hearted job killer. The latest spot, called "Olive," features a woman who voted for Romney in the 2002 Massachusetts governor election but now supports President Barack Obama.
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The ad, which Priorities said would air in Florida, Colorado, Iowa, Ohio and Virginia, was timed to premiere as the Republican National Convention gets underway in Tampa.
"I'm an independent. I voted for him, I contributed to him," says Olive Chase in the ad. She is identified by Priorities USA as the owner of a small catering company.
"Gov. Romney promised that he would bring jobs to this state," she continues. "By the time Governor Romney left office, we had fallen to 47th in the nation in terms of job growth."
Politifact has rated that claim "half-true," noting that while the number is correct, it exaggerates the effect Romney - or any state's governor - has on job creation.
In the Priorities spot, Olive Chase says Romney "cares about big business, he cares about tax cuts for wealthy people."
"I certainly do not believe he cares about my hardworking employees," she concludes. "I feel like I was duped by Mitt Romney. I'm going to vote for President Obama."
Bill Burton, a co-founder of Priorities USA, said the new spot was the first element in a project focusing on how Romney's policy proposals would affect the middle class. Burton said the effort would cost the group $30 million.
Previously, Priorities spent $20 million on a project attacking Romney's business career, including in a much-maligned spot that linked Romney to the death of a coal worker's wife. The coal worker, Joe Soptic, worked at a plant that closed after being acquired by Bain Capital.
That spot never aired as a paid advertisement on television except for one mistaken airing in Ohio. It did, however, run frequently as part of news programs.
"Americans are going to hear a lot about Mitt Romney this week," Burton said. "These new ads are designed to make sure voters hear the whole story. Looking back to his record in Massachusetts, Mitt Romney failed the people who made him governor."
Responding to the ad, Romney's campaign described the spot as a "desperate attempt" by Obama's allies to distract from the president's "failed record."
“President Obama’s policies have devastated the middle class and led to record unemployment and less take-home pay," Romney spokeswoman Amanda Henneberg said in a statement. "We are happy to compare the 4.7% unemployment rate Mitt Romney achieved with President Obama’s record of 42 straight months of unemployment above 8 percent any day.”
CNN Political Editor Paul Steinhauser contributed to this report.
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