Republican presidential hopeful Texas Gov. Rick Perry (left) shakes hands with a supporter as he goes onstage at the Polk County GOP summer picnic event held at the Iowa State Fairgrounds in Des Moines on Saturday. Nati Harnik/AP hide caption

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Federal Reserve Chairman Ben Bernanke walks past reporters as he arrives at the economic policy symposium at Jackson Hole in Moran, Wyo., on Friday. Reed Saxon/AP hide caption

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Investors are closely watching Federal Reserve Chairman Ben Bernanke's speech Friday in Jackson Hole, Wyo. Alex Wong/Getty Images hide caption

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President Obama speaks Monday at the town hall-style meeting at the Lower Hannah's Bend Park in Cannon Falls, Minn. Obama is on a bus tour of Minnesota, Iowa and Illinois where he is scheduled to speak with people about economic issues. Joe Raedle/Getty Images hide caption

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