I'm asking because the answer is "yes" if you go by conventional rules. That and the fact that we have also laughed at the idea of Santorum winning Iowa or Colorado.
His successes during this primary season would make him the traditional "next-in-line". It already seems like Republicans don't break their "next-in-line" even if it means that they have to nominate Mitt Romney.
And except for the 1981-1993 period, no party has controlled the White House for more than two presidential terms in the past 60 years.
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