I can see why he wouldn't do it again after the previous disaster. He is obviously scared out of his mind at the thought of looking like the village idiot for a second time.
He's probably relying on character assassination ads and delying/disputing the election results as his end-game strategy.
Hopefully she can nudge another percent or two overall and in the swing states, so that it doesn't end up being all about a state or two. Win the rust belt, plus NC, AZ and GA, say. He'll whine about it, but the courts won't give him the election if it isn't close.