Two new InsiderAdvantage polls, one in Georgia and another soon to be released in another major Southern state, show former New York City Mayor Rudy Giuliani leading the pack of potential Republican presidential candidates. No real surprise there, as Giuliani leads in national polls, too.

But here is his big problem: While GOP voters say they like Rudy, he doesn't lead by a poll margin significant enough to be safely ahead. And among potential candidates, Giuliani enjoys perhaps the hi ...

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