Christie would probably rather drop than the embarrassment of being at the kiddie debate.
It worked for Fiorina because (A) she was the only woman in the race, (B) intellectually formidable, and (C) something of an unknown quantity. Christie is much more well known, and the general consensus about him has evolved to where he is considered somewhat unsavory. Plus, when you are booted DOWN to the "kiddie table", it's not a good thing. It's like being the valedictorian of summer school.
