Charleston, South Carolina (CNN) - Mitt Romney has enlisted John McCain, one of his top campaign surrogates, to voice a robocall blasting Newt Gingrich for his "unacceptable" attacks on Bain Capital and Romney's private sector background.
The robocalls - the latest sign of the Romney campaign's renewed anxiety about Gingrich - began hitting South Carolina households last night.
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"Newt Gingrich has experienced a lot of backlash over the last few days for his attacks on capitalism and Republican principles, and rightfully so," McCain says in the call. "He must have forgotten that Republicans stand up for free enterprise and strong work ethic."
Gingrich is using "talking points straight out of Barack Obama's campaign playbook" and has adopted "the dangerous anti-capitalism rhetoric used by the Democrats," McCain says in the call, which was provided to CNN by a Republican voter.