I don't know this race in particular, but I can make a national generalization:
Watch the precinct turnout! The Democrats are so scared that I predict we will see turnouts that are mathematically impossible because the fraud machine will be in overdrive. They've been edging closer and closer to the line in recent elections (look at Johnson/Thune, for example). I won't be surprised to see greater than 100% turnout in precincts where Democrats "squeak" by in the early hours of the morning.
-PJ