“Trump plays chess while these guys play checkers.”
I suspect Trump got some good “intel” about how FOX would handle the so-called debate.
He had spies inside war room.
He is well connected.
D.W. Ulsterman On The Donald Trump -vs- Fox News Debate Dispute
http://ulstermanbooks.com/d-w-ulsterman-on-the-donald-trump-vs-fox-news-debate-dispute/