Can he block Bolton? B doesn't work for t any more. Perhaps he has a bigger object in mind?
I just read that Rex Tillerson criticized t's behavior today.
Bolton might be hoping that he won't have to testify if t resigns or leaves office by other means before he gets dragged in under subpoena, Then he will be able to keep his reputation among whatever that political faction decides to call itself. Miller, Hannity, Pence, maybe Nikki Haley will never give up - they are too embedded in enabling t's corruption.
Or maybe he's just saving up all he knows for a book that will be a best-seller without institutional sales.