Because nothing has been proven, and because many of those out of state voters were students. Nobody has checked how many and probably never will.
But it’s not established fact—yet—that all those votes were illegal.
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.
No there’s no proof yet but over 5,000 apparently showed driver’s licenses to vote yet never changed their license to NH. I don’t have the article in front of me but an insignificant number were students, and subtracted before the 5k number.
There won’t be proof if this gets buried, need to find out who those voters were and possibly prosecuted for fraud.
Many if those students probably filed for residency if they wanted in-state tuition. And NH law requires getting an NH driver’s license within 60 of establishing residency. If some if these voters were students from out if state, I wonder how many elections they voted in? It should be easy enough to find out who these voters were, if they were real people. If anyone in charge really wants to that is.