"You know, in the past when somebody pointed out that something was inaccurate campaigns either pulled the ad - they were embarrassed," Romney said on Bill Bennett's "Morning in America" radio show. "Today, they just blast ahead."

The Obama campaign has faced mounting criticism over the ad not just from Romney but independent fact-checkers, though the ad was produced by the purportedly independent super PAC Priorities USA.

Further, Obama Deputy Campaign Manager Stephanie Cutter is now being accused by the Romney campaign of lying over what she knew about the man at the center of that ad.

Cutter appeared on CNN Wednesday morning to say, among other things, that "I don't know the facts" about the case of Joe Soptic, the steelworker who appeared in the video. In the ad, Soptic, recounts how his wife died of cancer after he lost his health insurance when his plant was shuttered after a takeover by Bain Capital and other companies working with the private equity firm.

Cutter said she didn't know when Soptic's wife fell ill, or about his health insurance.

Yet in May, Cutter herself hosted a conference call in which Soptic detailed his case to reporters. During the call, as he did in the ad, Soptic explained how his wife fell ill after he lost his job, and how he lost his health insurance. The call took place as Soptic began appearing in Obama campaign ads, and was featured in a profile on the Obama campaign website.
Romney asks where 'hope and change' went amid furor over ad, Obama aides' response | Fox News

Typical political mudd slinging tactic, if you throw enough something is bound to stick.