President Obama examines batteries for electric trucks while touring Smith Electric Vehicles in Kansas City, Mo., earlier this month. Saul Loeb/AFP/Getty Images hide caption

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Former Alaska Gov. Sarah Palin waves to supporters after endorsing South Carolina gubernatorial candidate Nikki Haley at a rally in Columbia, S.C., in May. Mary Ann Chastain/AP hide caption

itoggle caption Mary Ann Chastain/AP

President Obama tours the V&M Star steel plant in Youngstown, Ohio, last month. The visit was part of a broader pitch by the president to show how the stimulus package is helping in places like Ohio. Jim Watson/AFP/Getty Images hide caption

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Mary Kay Henry is the new president of the 2.2 million-member Service Employees International Union. She was elected over the weekend and replaces Andy Stern, who retired last month. SEIU hide caption

itoggle caption SEIU

"The one mistake — the one mistake we cannot make this November — is to lose," Republican National Committee Chairman Michael Steele said. Gerald Herbert/AP hide caption

itoggle caption Gerald Herbert/AP

Sarah Palin signs autographs after speaking at the Southern Republican Leadership Conference in New Orleans on Friday. Gerald Herbert/AP hide caption

itoggle caption Gerald Herbert/AP