FILE - This Nov. 13, 2012 file photo shows New Jersey Gov. 

FILE - This Nov. 13, 2012 file photo shows New Jersey Gov. Chris Christie speaking in Trenton, N.J. Mitt Romney’s shadow looms over a GOP in disarray. Republican officials in Washington and elsewhere concede that Romney’s immediate withdrawal from politics _ while welcome by most _ has created a leadership void, leaving the GOP rudderless and fighting with itself during what may be the most important policy debate in a generation.  (AP Photo/Mel Evans, File)
Associated Press
FILE - This Nov. 13, 2012 file photo shows New Jersey Gov. Chris Christie speaking in Trenton, N.J. Mitt Romney’s shadow looms over a GOP in disarray. Republican officials in Washington and elsewhere concede that Romney’s immediate withdrawal from politics _ while welcome by most _ has created a leadership void, leaving the GOP rudderless and fighting with itself during what may be the most important policy debate in a generation. (AP Photo/Mel Evans, File)
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