Texas Gov. Rick Perry speaks at a campaign event at Clark Electric Co-op on Dec. 27 in Osceola, Iowa. Perry's stance on immigration has troubled some Iowa voters. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

President Obama makes an economic case for immigration reform at the Chamizal National Memorial on Tuesday in El Paso, Texas. Jewel Samad/Getty Images hide caption

itoggle caption Jewel Samad/Getty Images