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An electoral official holds ballots to distribute as voters register during republican caucues at a school  in Des Moines, Iowa, on January 3, 2012. Iowa fires the first shot of the 2012 battle for the White House on Tuesday with a keenly watched but unpredictable vote on which Republican should challenge President Barack Obama in November. With half of this heartland state's voters still up for grabs, frontrunner Mitt Romney, 64, was locked in a neck-and-neck race with Representative Ron Paul and former senator Rick Santorum in the party's first nominating test. AFP Photo/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
An electoral official holds ballots to distribute as voters register during republican caucues at a school  in Des Moines, Iowa, on January 3, 2012. Iowa fires the first shot of the 2012 battle for the White House on Tuesday with a keenly watched but unpredictable vote on which Republican should challenge President Barack Obama in November. With half of this heartland state's voters still up for grabs, frontrunner Mitt Romney, 64, was locked in a neck-and-neck race with Representative Ron Paul and former senator Rick Santorum in the party's first nominating test. AFP Photo/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)

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    Iowa caucus count unresolved

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Iowa caucus count unresolved

Mitt Romney said the results from this month's Iowa caucuses show a "virtual tie" between him and Rick Santorum.

Iowa caucus count unresolved

Mitt Romney said the results from this month's Iowa caucuses show a "virtual tie" between him and Rick Santorum.