Just because the polls underestimated Heitkamp in 2012 doesn’t mean they will underestimate her again this year. And the difference between 2012 and 2018 is that there were actually polls showing Heitkamp up in 2012. There hasn’t been one this year since February (and that was from Gravis and had 17% undecideds), and apparently private polling has been pretty ugly for Democrats here. The ND GOP is also much more competent than MO GOP/MT GOP/etc., and Cramer isn’t as "weak" as this forum is making him out to be.
The problem with that argument is that there have not really many polls of this race *period* this year
