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DUBUQUE, IA - JANUARY 02: Sen John Thune (R-SD) (L) gets a laugh and applause from former Massachusetts Gov. and Republican presidential candidate Mitt Romney (R) and Rep. Jason Chaffetz (R-UT) during a rally at the Weber Paper Company January 2, 2012 in Dubuque, Iowa. Polls show that Romney is leading a large field of GOP candidates going into Tuesday's "first in the nation" Iowa Caucuses. Chip Somodevilla/Getty Images/AFP