I believe if he had a 'come to Jesus' moment and renounced Trump and started talking sense again, he could cause Trump and the family NO END of problems.
I doubt it. The two jeniuses mentioned upthread would just say that was "proof" that everyone is out to get Donnie. Rudi being either replaced by a robot programmed by Clinton, or that any footage was deepfake, or that Rudis was being coerced into it because "they" have got his family in a pizzeria in Pennsylvania.
Or something.
When they say there's no arguing with stupid, they are right.