Ken Buck accepts the Republican nomination for Senate on Aug. 10 in Loveland, Colo. Buck, the Weld County district attorney, defeated former Colorado Lt. Gov. Jane Norton in the primary. Eric Bellamy/The Daily Tribune/AP hide caption

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A new poll by Pew Research says that only 1 person in 3 knows President Obama is a Christian, while nearly 1 in 5 thinks he's a Muslim. Andrew Wardlow/AP hide caption

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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

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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