The governor told people attending an event at a Princeton bookstore on Tuesday that he got upset with himself when his clothing wouldn't fit.
The Record newspaper reports Christie appeared at the shop with MSNBC hosts Joe Scarborough and Mika Brzezinski to promote Brzezinski's new book "Obsessed," which includes an interview with Christie about his weight.
The governor says he often hears from people who don't understand the struggle.
Christie says "It's not as simple as, 'Push yourself away from the table and you'll be fine.'?"
In February, he had a band surgically placed around his stomach to restrict how much food he could eat.
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Information from: The Record (Woodland Park, N.J.), http://www.northjersey.com