I was waiting for this to happen the moment the article was dropped about him 'accidentally deleting' and 'no way to recover without too much off an issue' his posts. I don't get his motives for deleting his old posts but surely in this day and age he had no doubt someone was archiving what he said?
Motivation is simple to discern. Look how many presidential hopefuls get buried by "thirty years ago he said X" or "fifty years ago there is a photo of him shaking hands with Y"