Hunter is a deeply troubled man but he isn't an idiot. He understands that the discovery phase isn't something he wants.
Contrast that with republican dumbfucks who will make empty threats before their lawyers explain why that is a bad idea and why they will be dropping them as clients (and setting a few server rooms on fire) before filing.
He is a "good republican". He dislikes trump because he lost influence but has no real problem with trump's america.
See also romney and the mccains.