New Obama ad on Romney: 'Dishonest'

President Obama's team released an ad today accusing Republican Mitt Romney of dishonesty during this week's debate, prompting the same claim from the Romney camp.

The ad shows Romney saying during Wednesday's debate that "I'm not in favor of a $5 trillion tax cut," with a narrator saying: "This was dishonest."

The ad comes three days after a debate that Romney won, according to post-performance polls.

The $5 trillion figure is not from Romney -- it's from analysts' estimates, based on the Republican's call for a 20% rate cut, plus his support of an extension of the George W. Bush tax cuts.

Romney also says he would offset the revenue impact of the rate cut by closing various tax loopholes. And his campaign also sent out a television clip in which Obama campaign aide Stephanie Cutter said Romney's 20% proposal would not add up to $5 trillion.

Said Romney spokesperson Amanda Henneberg: "It's clear the President is willing to say and do anything to avoid talking about his own record of fewer jobs, declining incomes and record poverty."

In its new ad, the Obama campaign also challenges Romney's debate claim that the president's policies will raise taxes on the middle class; it points out that claim is based on a study from "a so-called independent group" that includes Romney associates and other Republicans.

"It''s just not true," the Obama ad said of Romney's claim.

The Romney campaign also released an ad today called "Melanie," featuring a former Obama voter.

"Melanie McNamara voted for Barack Obama in 2008," says the Obama campaign. "She believed he would lead our country to prosperity. Four years later, she's voting for Mitt Romney because she wants to make sure that our economy is growing again."