And even if the number of fraudulent voters turns out to be greater than the margin of victory for the Democrat, you can’t prove anything by that, because we have the secret ballot in our elections.
We can informally assume that all these voters preferred the Democrat Senate candidate, and also Hillary, who carried NH by a tiny margin. But how can you prove their votes were actually cast for the Democrats? I don’t think you can.
It’s irrelevant who the votes went to. The only relevant point is whether those 5,000+ votes were legal votes or not. It would be easy to find out, but I doubt it will happen.