Barack Obama 2012

Associated Press
FILE - In this Nov. 22, 1963 file photo, first lady Jacqueline Kennedy leans over President John F. Kennedy as Secret Service agent Clinton Hill rides on the back of their car after the president was shot in Dallas.  The Secret Service has been tarnished by a prostitution scandal that erupted April 13, 2012 in Colombia involving 12 Secret Service agents, officers and supervisors and 12 more enlisted military personnel ahead of President Barack Obama's visit there for the Summit of the Americas. (AP Photo/Ike Altgens)

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In November, President Barack Obama faces off against the Republican Party nominee, Mitt Romney.

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