Republican presidential candidate Mitt Romney speaks during a roundtable discussion on manufacturing this Wednesday in Bedford Heights, Ohio. MANDEL NGAN/AFP/Getty Images hide caption

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Coal miners listened as GOP presidential nominee Mitt Romney spoke during a rally last month in Beallsville, Ohio. Both Romney and President Obama have made the state a focal point of their campaigns. Justin Sullivan/Getty Images hide caption

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Traders work in the bond pit at the Chicago Board of Trade in 1995. In recent decades, much of the trading has left the pits and gone electronic. Michael S. Green/AP hide caption

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The General Motors logo is displayed atop the Renaissance Center in Detroit. The automaker, while doing much better following the government bailout, is still lagging some of its competitors. Carlos Osorio/AP hide caption

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A view of the skyline of Charlotte, N.C., on Sunday. Preparations for the Democratic National Convention are under way around Charlotte, where the party is expected to nominate President Obama to run for a second term. Mladen Antonov/AFP/Getty Images hide caption

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