Chris Christie

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Democrats were gleeful when Republicans Chris Christie and Rand Paul got tangled this week in the debate over the Disneyland measles outbreak, until similar words from the pasts of President Obama and 2016 front-runner Hillary Rodham Clinton came out. (Associated Press)

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New Jersey Gov. Chris Christie speaks during the Freedom Summit in Des Moines, Iowa, in this Jan. 24, 2015, file photo. (AP Photo/Charlie Neibergall)

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National Edition News cover for January 31, 2015 - Christie bets big on sports gambling: New Jersey Gov. Chris Christie holds a souvenir football helmet as he leaves after a ceremony to pass official hosting duties of next year's Super Bowl to representatives from Arizona, Saturday Feb. 1, 2014 in New York. Fellow Republicans are assessing the damage of new allegations that Gov. Christie knew about a traffic-blocking operation orchestrated by top aides. (AP Photo/Bebeto Matthews)

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New Jersey Gov. Chris Christie was not always a top advocate for legalized sports betting, but had a change of heart last year after four Atlantic City casinos closed, including the Revel, which opened just two years earlier in a move the Republican governor had hoped would be a "turning point" for the struggling city. (Associated Press)

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gambler: New Jersey Gov. Chris Christie (inset) has been trying to get the New Jersey Legislature to reconsider allowing sports gambling in the state to help save the beachside resort of Atlantic City, which in 2014 saw four casinos shuttered and thousands of workers laid off. (ASSOCIATED PRESS PHOTOGRAPHS)

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New Jersey Gov. Chris Christie stands next to a rolling chair before he made a speech in Atlantic City N.J., on Thursday, May 24, 2012. Sports betting could be up and running this fall in New Jersey under a plan that would defy a federal ban on such wagering in all but four states. Christie, who earlier this year signed a sports betting law, says New Jersey will act on its own to implement sports betting.(AP Photo/Wayne Parry)

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Gov. Chris Christie tried to institute sports betting at New Jersey racetracks but was successfully sued by pro sports leagues. Mr. Christie may try to revive the notion for Atlantic City to boost his 2016 electability. (associated press)

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New Jersey Gov. Chris Christie takes a question about the "epic" incoming snowstorm, with help from Lt. Gov. Kim Guadagno and other officials. (associated press)

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New Jersey Gov. Chris Christie greets U.S. Sens. Joni Ernst and Charles Grassley during Iowa Gov. Terry Branstad's inauguration ceremonies, Friday. Mr. Christie tried to assure Iowa voters that he shares their conservative values, including on pro-life issues. (Associated Press photographs)

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New Jersey Gov. Chris Christie, left, applauds as Maryland Gov. Larry Hogan delivers remarks during an inaugural ceremony for Hogan at the statehouse, Wednesday, Jan. 21, 2015, in Annapolis, Md. (AP Photo/Patrick Semansky) ** FILE **

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CORRECTS ID FROM JOHN MARA TO STEVE TISCH - Dallas Cowboys owner Jerry Jones, left, New Jersey Gov. Chris Christie and New York Giants executive vice-President Steve Tisch, right, talk before an NFL football game between the Giants and Cowboys, Sunday, Sept. 8, 2013, in Arlington, Texas. (AP Photo/LM Otero)

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New Jersey Gov. Chris Christie may not have the political legacy of Mitt Romney or Jeb Bush, but there is plenty of room and enough money to go around for him to enter the presidential race with other establishment Republicans, analysts and supporters say. (Associated Press)

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New Jersey Gov. Chris Christie attends a gathering to announce that Seton Hall University and the parent company of Hackensack University Medical Center are planning to build a private medical school, Thursday, Jan. 15, 2015, in Nutley, N.J. (AP Photo/Julio Cortez)

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In his State of the State address New Jersey Gov. Chris Christie said the U.S.' image has suffered under President Obama.

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As a state trooper stands guard nearby, New Jersey Gov. Chris Christie delivers his State Of The State address in the State House, Tuesday, Jan. 13, 2015, in Trenton, N.J. Christie aimed at national issues as well as those in his state, and he noted lessons learned while traveling the country last year to campaign for Republican gubernatorial candidates. (AP Photo/Mel Evans)