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

itoggle caption Andrew Wardlow/AP

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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Sen. Russell Feingold (D-WI), with Rep. Barbara Lee (D-CA). Alex Wong/Getty Images hide caption

itoggle caption Alex Wong/Getty Images