While it is clear that Heidi is down, and not favored to win reelection,the margin is really the question here. So far, we have gotten 3 polls for the race, and only one can be said to be of actual quality, the Fox poll, at -12. This new poll that we have gotten is from a company with no track record, and no history to compare to. Not to mention the glaring problems with the poll(Trump more popular in ND than WV, Rs making up 60% of the electorate, Is making a measly 10%, Heidi having a suddenly terrible approval, and Cramer suddenly rising exponentially in approvals, Marijuana ballot completely failing when other polls have shown a close race or even the proposition winning). All of these factors have never fit with the state in other polling/election results, and yet, here they are.
As I said before, Heidi isnt favored, shes probably gonna lose, but this poll is so flawed that it shouldnt be the factor that obliterates her. If Fox comes and says "Guess what shes down by 16", then shes DOA, but this poll should be taken with a tablespoon of salt.
Could be a combination of the Kavanaugh vote and the list of women controversy.