WASHINGTON (August 9, 2012)--President Barack Obama’s campaign is launching a new ad that questions whether GOP challenger Mitt Romney paid any income taxes in the past.

The ad shows footage from a Romney interview with ABC News in which the Republican presidential candidate was asked if he had ever paid a lower tax rate than 13.9 percent.

The narrator asks, "Did Romney pay 10 percent in taxes? Five percent? Zero?"

The ad is slated to air in Virginia, North Carolina, Florida and Ohio during the coming week.

Those are the same states where Romney is taking a bus tour beginning Saturday.

Obama allies such as Senate Democratic leader Harry Reid have questioned whether Romney paid taxes in the past decade.

Romney has responded that he has paid taxes every year and adds, "a lot of taxes."