Anything at all that weakens him is good. Republicans can be as scared of him as they like, but if they think they’re going to lose their seats, then what Trump thinks will suddenly matter less.
It’s never a one and done solution. And it’s never a single battle. But every wound that it’s possible to inflict on him is one more victory.
This isn’t going to be a sprint. It’s going to be a marathon. And at some point, when he starts to get scared, he’ll over-react.