Trump could offer a pardon and $10 million to anyone from either party who comes forward with solid evidence of how this thing works. He can also promise to praise them as heroes.
And he should keep those promises. Not everyone who is corrupt is happy about it, and the blackmailers are clearly in a position to twist the knife. There may be multiple people out there losing sleep right now. It is not my impression any of this is a closely guarded secret within the clique.
It has simply been the case that for many years Republicans have turned a blind eye to Democrat shenanigans, and they for their part no doubt figured if they didnt get too greedy the extent of the operation would never see the light of day.
But they DID get too greedy. They had no choice this time.