.
He is angry because the information is being used mendaciously.
Obviously Trump would get nowhere running an honest campaign.
He has to pump trash.
The way I read the reports ...
Mark Levin says someone or some people are trying to intimidate him into silence ...Levin says his fiancee's son can work anywhere he wants and for anyone he wants ...
Levin says he will not be intimidated and he's furious that someone thinks they can intimidate him with this nothing-burger.
What I don't understand is how the disclosure amounts to intimidation, a label that Levin chooses. If, as you say, the relationship was already disclosed, then nothing changed.
Here is an example of what might be mendacity, fabricated outrage based on a false premise that this was "news."
Moments ago, Levin was forced to admit that his fiance's son works for Cruz. The fact that he never disclosed this conflict of interesting speaks to his level of credibility.
Oh well. He's a big boy, and he can handle the truth, and he knows how to deal with libelous remarks.