FILE - In this June 4, 2013, file photo New Jersey Gov. Chris Christie answers a question at a news conference in Trenton, N.J. A series of unorthodox decisions by New Jersey Gov. Chris Christie points to a simple political calculation for a potential presidential campaign: long-term gain beats short-term pain. Christie last week refused to appoint a fellow Republican to complete the full 17 months of the late Democratic Sen. Frank Lautenberg's term. "There's no political purpose. The political purpose is to give the people a voice," he said last week, shrugging off GOP criticism from Capitol Hill over the Senate election schedule. (AP Photo/Mel Evans, File)

Associated Press
FILE - In this June 4, 2013, file photo New Jersey Gov. Chris Christie answers a question at a news conference in Trenton, N.J.  A series of unorthodox decisions by New Jersey Gov. Chris Christie points to a simple political calculation for a potential presidential campaign: long-term gain beats short-term pain. Christie last week refused to appoint a fellow Republican to complete the full 17 months of the late Democratic Sen. Frank Lautenberg's term. "There's no political purpose. The political purpose is to give the people a voice," he said last week, shrugging off GOP criticism from Capitol Hill over the Senate election schedule.  (AP Photo/Mel Evans, File)
FILE - In this June 4, 2013, file photo New Jersey Gov. Chris Christie answers a question at a news conference in Trenton, N.J. A series of unorthodox decisions by New Jersey Gov. Chris Christie points to a simple political calculation for a potential presidential campaign: long-term gain beats short-term pain. Christie last week refused to appoint a fellow Republican to complete the full 17 months of the late Democratic Sen. Frank Lautenberg's term. "There's no political purpose. The political purpose is to give the people a voice," he said last week, shrugging off GOP criticism from Capitol Hill over the Senate election schedule. (AP Photo/Mel Evans, File)
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