Let the Democrats call him. Nothing is stopping them in the House from finding out the truth.
If that’s really their concern.
The NYT is full of lots of hot air. The good guys got lots of bad stuff on bad people and its soon their turn to shoot back.
Bolton’s memoirs are on hold as there is potential privileged information in them. Look back at the reporting on this, his book failed the vetting process and until it is cleared it will not be printed
Period
If they do then there will be Hell to pay for all involved
He won’t be allowed to testify unless it is a proper impeachment inquiry, with representation for the President at a minimum.