President Obama’s campaign continued on Saturday to prosecute its case against Mitt Romney for holding offshore accounts, releasing a new television ad that mockingly shows Mr. Romney, the Republican candidate, singing “America the Beautiful.”

The president’s campaign has spent more than a week hammering Mr. Romney’s personal wealth and calling on him to disclose more information about his personal finances by releasing his tax returns.

The new ad — which the campaign said was running in Colorado, Florida, Iowa, North Carolina, Nevada, New Hampshire, Ohio, Pennsylvania, and Virginia — reminds viewers of those issues even as it shows a clip of Mr. Romney singing at a campaign event in Florida earlier this year.



It says Mr. Romney shipped jobs to Mexico, China and India — accusations that Mr. Romney’s campaign vehemently denies. And it notes that Mr. Romney had “millions” in a Swiss bank account and “tax havens” in Bermuda and the Cayman Islands.

“Mitt Romney’s not the solution,” the ad states. “He’s the problem.”

Amanda Henneberg, a spokeswoman for the Romney campaign, said of the ad, “As the failures of his presidency become more evident, Barack Obama has resorted to the tactics of a typical politician – dishonest and totally unsubstantiated attacks meant to distract from his own record by smearing the reputation of his opponent. The Obama campaign appears to be stuck in their own ‘groundhog day,’ repeating the same, debunked charges they’ve waged for weeks in an effort to distract voters from this administration’s failure to fix the economy and create jobs.”

Mr. Romney’s campaign has repeatedly defended the offshore accounts, saying that he paid all the taxes he was legally required to pay. On Friday, Mr. Romney again refused to release multiple years of his tax returns.

“I know there will always be calls for more. People always want to get more,” Mr. Romney said on CNN. “And, you know, we’re putting out what is required plus more that is not required. And those are the two years that people are going to have. And that’s — that’s all that’s necessary for people to understand something about my finances.”