In this photo released by CBS Broadcasting, New Jersey Gov. Chris Christie, left, and late night host David Letterman, right, react with laughter during the Governor's first visit to CB

 

              In this photo released by CBS Broadcasting, New Jersey Gov. Chris Christie, left, and late night host David Letterman, right, react with laughter during the Governor
In this photo released by CBS Broadcasting, New Jersey Gov. Chris Christie, left, and late night host David Letterman, right, react with laughter during the Governor's first visit to CBS’ “Late Show with David Letterman,” on Monday, Feb. 4, 2013 in New York. (AP Photo/CBS Broadcasting, Jeffrey Neira)