Christie is hardly a vote-draw away from anyone, even the current hopefuls in the one-digit range. If he thinks he can peel off some votes from Trump, he’s only fooling himself. Perhaps he’s in it for the campaign funds that magically disappear after candidates drop out.
He’s quick on his feet (in a debate). He can take people down with his debating. Desanctimonius better be careful but he’s probably going to be hands off everyone but Trump...unless Trump isn’t in the debate (might be a good strategy for the first few)