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FILE - In this July 2, 2012 file photo, New Jersey Gov. Chris Christie speaks to a joint session of the legislature, in Trenton, N.J. Christie, the sometimes abrasive but always entertaining governor of New Jersey, is set to be announced Tuesday as the keynote speaker for the Republicans' national convention later this month. (AP Photo/Mel Evans, File)

Associated Press
FILE - In this July 2, 2012 file photo, New Jersey Gov. Chris Christie speaks to a joint session of the legislature, in Trenton, N.J. Christie, the sometimes abrasive but always entertaining governor of New Jersey, is set to be announced Tuesday as the keynote speaker for the Republicans' national convention later this month. (AP Photo/Mel Evans, File)
FILE - In this July 2, 2012 file photo, New Jersey Gov. Chris Christie speaks to a joint session of the legislature, in Trenton, N.J. Christie, the sometimes abrasive but always entertaining governor of New Jersey, is set to be announced Tuesday as the keynote speaker for the Republicans' national convention later this month. (AP Photo/Mel Evans, File)
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