Businessman Herman Cain is leading President Obama in a new head-to-head poll, with seniors and independents taking a particular liking to Cain's unconventional candidacy. 

The survey from Rasmussen Reports showed Cain squeaking ahead of Obama in a hypothetical general election contest, pulling in 43 percent compared with Obama's 41 percent. 

The lead is within the margin of error. But Cain is the only Republican to have any lead over Obama in head-to-head polls conducted by Rasmussen over the past several weeks. 

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