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INDEPENDENCE, IA - JANUARY 02: Republican presidential candidate and former Speaker of the House Newt Gingrich (L) speaks at the Heartland Acres Agribition Center as his wife Callista Gingrich listens on January 2, 2012 in Independence, Iowa. The GOP presidential contenders are crisscrossing Iowa in the final stretch of campaigning in the state before the January 3rd caucus, the first test the candidates must face before becoming the Republican presidential nominee. Andrew Burton/Getty Images/AFP