Wow--I wasn't expecting this. Especially since Stenehjem got the party's endorsement at the convention earlier in the year. Is Burgum a Tea Party guy?
He isn't really a tea party guy, some of the more conservative people in the state thought he was too moderate. That said some of those people might have just not liked him because he is from Fargo.
Like I said before a decent chunk of Burgum's margin of victory was probably Dem crossover voters, he was there one shot to stick it the ND GOP establishment and try to bring in some new blood. He would have still won without them but it would have been much closer.