Brett O'Donnell, right, at the Republican National Convention in St. Paul, Minn., Sept. 4, 2008. O'Donnell worked with GOP presidential candidate John McCain as his debate coach. Charles Dharapak/ASSOCIATED PRESS hide caption

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President Obama waves after speaking at a UPS facility in Las Vegas on Thursday. Nevada is one stop on the president's latest road trip focusing on the economy. Julie Jacobson/AP hide caption

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President Obama tours Conveyor Engineering and Manufacturing in Cedar Rapids, Iowa, on Wednesday. Jewel Samad/AFP/Getty Images hide caption

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In the final State of the Union address of his term, President Obama called for an economy "where everyone gets a fair shot." Brendan Smialowski/Getty Images hide caption

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Alexandra Ziegler, age 9, leafletting for Gingrich in Greenville, S.C. Melissa Block/NPR hide caption

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Rep. Michele Bachmann, R-Minn., announces an end to her campaign for president on Wednesday in Des Moines, Iowa. Chris Carlson/AP hide caption

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