Importantly, it is unlikely that any of the three candidates can win outright. So the idea is that if Roy Moore and Mo Brooks take the 1st and 2nd place in the runoff, it will shut out and eliminate Luther Strange, and be a major rebuke to the GOP establishment.
The problem is that it most likely will be a run-off between Strange and either Moore or Brooks.
Big Luther is been smearing Mo Brooks by claiming he supports San Fran Nan. You would have completely ignorant of who Mo Brooks is, or stupid, to believe this smear.