Chris Christie

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** FILE ** New Jersey Gov. Chris Christie speaks at a town hall at the Somerset National Guard Armory, Tuesday, April 15, 2014, in Somerset, N.J. (AP Photo/The Daily Record, Bob Karp)

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FILE - In this Tuesday, March 11, 2014, file photo, New Jersey Gov. Chris Christie's former Deputy Chief of Staff Bridget Anne Kelly waits in court for a hearing, in Trenton, N.J. Kelly and Bill Stepien, two former associates of Christie, do not have to hand over documents to a legislative committee investigating the traffic jam scandal engulfing the governor, a New Jersey judge ruled Wednesday, April 9, 2014. (AP Photo/Mel Evans, Pool, File)

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Protestors gather across the street from Winston Churchill Elementary School before New Jersey Gov. Chris Christie arrived for a town hall meeting, Wednesday, April 9, 2014, in Fairfield, N.J. Christie is planning to continue his campaign for changes to New Jersey's pension system for public workers. The appearance comes as federal investigators and lawmakers continue a pair of probes into a political retribution scheme revolving around lane closures near the George Washington Bridge last year. (AP Photo/Julio Cortez)

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Protestors gather across the street from Winston Churchill Elementary School before New Jersey Gov. Chris Christie arrived for a town hall meeting, Wednesday, April 9, 2014, in Fairfield, N.J. Christie's appearance Wednesday comes as federal investigators and lawmakers continue a pair of probes into a political retribution scheme revolving around lane closures near the George Washington Bridge last year. (AP Photo/Julio Cortez)

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Protestors gather across the street from Winston Churchill Elementary School before New Jersey Gov. Chris Christie arrived for a town hall meeting, Wednesday, April 9, 2014, in Fairfield, N.J. Christie's appearance Wednesday comes as federal investigators and lawmakers continue a pair of probes into a political retribution scheme revolving around lane closures near the George Washington Bridge last year. (AP Photo/Julio Cortez)