He can't lose. Either the network caves or the case goes on forever, through the primaries. Trump has gauged how fed up real US citizens are with the invasion of the US, and the criminal element it brings into the US.
This is what I like about Trump. The network tried to show him up. He did something bold where whatever they do, he wins. And while it's happening, and everyone else is pandering, Trump wins over voters for not being a wimp.
I love the way Trump's mind works.
I think he also understands that normal Americans really resent the way the alphabet networks keep their thumbs on the scales for leftists in all politics. Anybody who is an enemy of (especially NBC) is a favorite of conservatives.