The latest Rasmussen poll shows Herman Cain leading Mitt Romney by 7 points among likely Iowa caucusgoers. Recent polls by PPP and Insider Advantage have shown Cain leading Romney by a similar margin. 

As for the rest of the field, Rasmussen shows Ron Paul at 10%, Newt Gingrich at 9%, Iowa straw poll winner Michele Bachmann at 8%, and Rick Perry at 7%. 

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