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FILE - In this Thursday, Feb. 9, 2012 file photograph, New Jersey 

FILE - In this Thursday, Feb. 9, 2012 file photograph, New Jersey Gov. Chris Christie, right, talks with Newark Mayor Cory A. Booker, during a ceremony in Newark, N.J.  On Thursday, Dec. 20, 2012, Booker ruled out a bid for New Jersey governor and is eyeing a run for U.S. Senate in 2014. Booker's announcement on Twitter Thursday ended months of speculation over whether the Democratic Party's biggest draw would seek to challenge Gov. Chris Christie in next year's governor's race. (AP Photo/Mel Evans, file)
Associated Press
FILE - In this Thursday, Feb. 9, 2012 file photograph, New Jersey Gov. Chris Christie, right, talks with Newark Mayor Cory A. Booker, during a ceremony in Newark, N.J. On Thursday, Dec. 20, 2012, Booker ruled out a bid for New Jersey governor and is eyeing a run for U.S. Senate in 2014. Booker's announcement on Twitter Thursday ended months of speculation over whether the Democratic Party's biggest draw would seek to challenge Gov. Chris Christie in next year's governor's race. (AP Photo/Mel Evans, file)
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