Thats an interesting way to describe being a cry baby.
But he'll be tough on other things as long as people treat him nicely
There are plenty of ways to look at this situation.
We can say he's being a cry baby, sure, but that's a bit simplistic. I think if he thought he needed this debate he'd show and, who knows, he still might.
We can also look at it as a game of brinksmanship. In this case, Trump holds the cards and he knows it.
This is a pissing contest between Trump and Ailes. Two ego-manics fighting on Twitter. It's absurd, really, from both perspectives.
But at the end of the day it is Fox that loses if Trump pulls out, no doubt about that. Trump knows it and has told the weaker party to get fucked. Baby? Maybe. Them that holds the gold make the rules? Definitely.