I agree that elections can come down to a handful of districts, but I don't agree that anyone can know what those districts are in advance. Polling just isn't t

I agree that elections can come down to a handful of districts, but I don't agree that anyone can know what those districts are in advance. Polling just isn't that good. You can fairly precisely target areas, but not exactly. You would either need to do fairly widespread hacking, or hack a few districts and hope for the best, which I think is an absurd proposition. Nobody would hack a couple districts "just in case", that's a massive risk with probably no gain. You either ensure victory, or do nothing.