(CNN) - An ad released Saturday by President Barack Obama's campaign features Mitt Romney singing "America, America" while the screen flashes with names of other countries.
Mexico, China, India, Switzerland, Bermuda, the Cayman Islands: all places Obama's campaign charges in the ad that Romney either "shipped jobs," "outsourced," or stored portions of his financial portfolio.
The ad comes after a week of unrelenting pressure on Romney's business record and personal financial decisions by Obama’s campaign.
In a series of television interviews Friday, the presumptive Republican presidential nominee addressed the attacks.
"One of their insiders said that their campaign was going to be based upon the strategy of 'kill Romney,' " he said of Team Obama in an interview on CNN.
The ad's soundtrack is from a campaign appearance in Florida last January, where Romney led his audience in a verse of "America, the Beautiful."
Romney's campaign has disputed what it called falsehoods about his leadership of the private equity firm, Bain Capital, as well as his substantial personal wealth.
This ad is the fourth in the past week for the Obama campaign.
This month, the president's campaign has purchased at least $25 million in television advertising time in key battleground states.
This new ad will air in Colorado, Florida, Iowa, Nevada, New Hampshire, North Carolina, Ohio, Pennsylvania and Virginia, according to Obama's campaign, as well as on CNN.
– CNN’s Paul Steinhauser and Gregory Wallace contributed to this report