Democratic presidential candidate Sen. Barack Obama, D-Ill., speaks at a town hall meeting at the North Carolina State Fairgrounds in Raleigh, N.C., Tuesday, Aug. 19, 2008.(AP Photo/Alex Brandon)

KISSIMMEE, Fla. (AP) -- A political group supporting the re-election of President Barack Obama is airing a new ad that criticizes challenger Mitt Romney for advocating tax policies that would increase the tax burden on middle-income families.

The ad by Priorities USA Action, a so-called super political action committee, uses an analysis by the independent Tax Policy Center and declares that Romney's plan would raise taxes on an average family by up to $2,000 while giving tax breaks of $250,000 to multimillionaires.

The ad is airing in Colorado, Florida, Iowa, Ohio, Virginia and Wisconsin.

Obama advisers say Romney and his allied super PACS have a 5-2 advantage in some television markets over Obama and his supporters.