Voters deposit their ballots during republican caucues at a school in Des Moines, Iowa. The share of registered Republicans who showed up declined to 19.9 percent from 21.1 percent in 2008. Photographer: Jewel Samad/AFP/Getty Images
Voters deposit their ballots during republican caucues at a school in Des Moines, Iowa. The share of registered Republicans who showed up declined to 19.9 percent from 21.1 percent in 2008. Photographer: Jewel Samad/AFP/Getty Images
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