A recent poll from CBS News now has the Republican field led by Herman Cain, followed by Newt Gingrich and Mitt Romney neck and neck.  Herman Cain's problems have been obvious, but he also has issues with his 9-9-9 plan and his foreign policy experience.  Newt Gingrich has been steadily gaining every time he debates.  Mitt Romney continues to perform well in every debate.  But why has he not been able to run away with the nomination?

Meanwhile, NBC News says Romney has a clear path to the nomination.  Who's right?

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