The problem, I believe, is that Chris Christie did NOT get his stomach “stapled”. There are several different weight loss surgeries, and Christie got the lap-band surgery. The lap-band surgery can be very effective — for people who are mildly-to-moderately obese. I have a friend who performs the surgery and she said that people who have struggled to lose and keep off 30 to 50 pounds are excellent candidates for this surgery. (She also thinks people who struggle with as few as fifteen or twenty pounds should consider it because it is reversible surgery.) In any case, Christie has a much more serious weight loss problem, so the lap band is not for him.
P.S. Believe it or not, Chris Christie used to be even fatter. look up that photo of him walking with President just after Hurricane Sandy. Yikes!