Republican Party Of Iowa

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** FILE ** Sen. Ted Cruz, Texas Republican, speaks to local residents during a fundraising picnic for the Iowa Republican Party in Des Moines, Iowa, on Friday, July 19, 2013. (Associated Press)

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Iowa Republican Party chairman A.J. Spiker.

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HOMETOWN HERO: Republican presidential candidate Rep. Michele Bachmann steps from her campaign bus to greet supporters after winning the Iowa Republican Party's straw poll on Saturday. (Associated Press)

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Rep. Michele Bachmann, Minnesota Republican, greets a group of supporters as she emerges from her campaign bus after winning the Iowa Republican Party's Straw Poll in Ames, Iowa, on Saturday, Aug. 13, 2011. (AP Photo/Charles Dharapak)

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Confetti falls as Rep. Michele Bachmann, Minnesota Republican, and her husband, Marcus, rally supporters at the Iowa Republican Party's Straw Poll in Ames, Iowa, on Saturday, Aug. 13, 2011. (AP Photo/Charles Dharapak)

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Former Minnesota Gov. Tim Pawlenty speaks during the Iowa Republican Party's Straw Poll on Saturday, Aug. 13, 2011, in Ames, Iowa. (AP Photo/Charlie Neibergall)