Perry Down, Cain Up; Why Can't Romney Pull Ahead?

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Southern evangelical Christians will have a big voice in the early Republican primaries. Will Mitt Romney's Mormon religion be an issue?  Why has Herman Cain outstripped Rick Perry in public opinion polls? We look at Republican prospects. Also, economists breathe a sigh of relief over jobs numbers. On Reporter's Notebook, is Afghanistan better off than it was 10 years ago? We hear what Afghan-Americans who went home to help out are saying now.

Banner image: Republican presidential candidates (L-R) Herman Cain, Gov. Rick Perry and Mitt Romney at the end of the presidential debate sponsored by CNN and the Tea Party Express on September 12, 2011 in Tampa, Florida. Photo by Win McNamee/Getty Images