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Associated Press
FILE - In this Oct. 17, 2011 file photo, President Barack Obama stands in front of his bus as he greets people in Boone, N.C. President Barack Obama is embarking on his first bus tour of the 2012 campaign, seeking to raise more questions about rival Mitt Romney’s business record. At the same time, the president will face another important update on the economy.  (AP Photo/Susan Walsh, File)

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