FILE - In this April 17, 2012, file photo Republican presidential candidate, former Massachusetts Gov. Mitt Romney,listens to Pittsburgh area residents in Bethel Park, Pa., during a campaign stop. Government spending differences are among the starkest between Romney and President Obama. Romney's campaign proposes few specifics: a 10 percent cut of the federal workforce through attrition, the end of federal family planning money, the privatization of Amtrak, and cuts in foreign aid. (AP Photo/Jae C. Hong, File)

Associated Press
FILE - In this April 17, 2012, file photo Republican presidential candidate, former Massachusetts Gov. Mitt Romney,listens to Pittsburgh area residents in Bethel Park, Pa., during a campaign stop. Government spending differences are among the starkest between Romney and President Obama. Romney's campaign proposes few specifics: a 10 percent cut of the federal workforce through attrition, the end of federal family planning money, the privatization of Amtrak,  and cuts in foreign aid. (AP Photo/Jae C. Hong, File)
FILE - In this April 17, 2012, file photo Republican presidential candidate, former Massachusetts Gov. Mitt Romney,listens to Pittsburgh area residents in Bethel Park, Pa., during a campaign stop. Government spending differences are among the starkest between Romney and President Obama. Romney's campaign proposes few specifics: a 10 percent cut of the federal workforce through attrition, the end of federal family planning money, the privatization of Amtrak, and cuts in foreign aid. (AP Photo/Jae C. Hong, File)
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