Obama campaign aide defends Biden 'buried' remark

Later on Tuesday, Biden modified his speech to say the middle class had been buried under policies pushed by Romney and Ryan. 

Cutter repeated Biden's modified attack on Romney and Ryan.

"You shouldn't be cutting taxes for those at the top and asking the middle class to pay for it," Cutter said. "You shouldn't be undoing reforms on Wall Street that will prevent another taxpayer bailout. Those are the exact policies that crashed our economy in the first place and that's what Mitt Romney and Paul Ryan are promising to take us back to. That's what the president — the vice president was communicating on the stump yesterday."

On Wednesday the Romney campaign released a new Web video, "Couldn't Say It Better," featuring Biden's comment spliced together with statements by Romney and Ryan saying the middle class has suffered under the Obama administration.