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FILE - In this Oct. 31, 2013 file photo, President Barack Obama speaks at the "SelectUSA Investment Summit" conference in Washington. For years, President Barack Obama’s personal favorability ratings served as a political firewall that sustained him through an economic recession, grueling fights with congressional Republicans, and the grind of a re-election campaign. But after a rough start to Obama’s second term, Americans increasingly view the president unfavorably. (AP Photo/ Evan Vucci, File)