I read that there will be no exit polls tonite, because the race tightened so close to the election, the news groups that do it, felt they could not develop an accurate model.
Sounds like BS to me, but that is what I read.
I googled Scott Brown Senate and found an article relating to your question not very long ago.
Voter fraud is alive and well. Photo every shred of it; time to expose and prosecute big time.