Is Herman Cain's poll numbers amongst GOP voters so low because Republicans would never nominate a black guy?

This guy has less than 2% of GOP support right now.

Despite the fact that he's much more right-wing than Mitt Romney, who is leading the pack.
Update: Lib Nemesis: Obama did 7 years in the Illinois Senate, and 4 years in the US Senate. 11 years total in public office. Yet, you're saying that's the same as Cain's experience, which is exactly 0 years?
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