Chris Christie

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Former New Jersey Gov. Brendan Byrne, right, reacts as Gov. Chris Christie talks during a celebrity comedy roast in honor of Byrne's 90th birthday, Tuesday, April 1, 2014, in Newark, N.J. (AP Photo/Julio Cortez)

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New Jersey Gov. Chris Christie, left, goes up to the podium to respond to a joke by comedian Joy Behar during a celebrity comedy roast in honor of former Gov. Brendan Byrne's 90th birthday, Tuesday, April 1, 2014, in Newark, N.J. (AP Photo/Julio Cortez)

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New Jersey Gov. Chris Christie, left, responds to a joke by comedian Joy Behar during a celebrity comedy roast in honor of former Gov. Brendan Byrne's 90th birthday, Tuesday, April 1, 2014, in Newark, N.J. (AP Photo/Julio Cortez)

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New Jersey Gov. Chris Christie speaks at the Republican Jewish Coalition on Saturday. He was one of several possible GOP presidential candidates gathered in Las Vegas as Sheldon Adelson, a billionaire casino magnate, looks for a new favorite to help in the 2016 race. (Associated Press)