The problem is there has been scant polling in key states, such as MO, IN, WV, and FL. Maybe there is the assumption that Dems are going to win those races again and it’s not close, but just today there was another ND poll which showed Cramer with an even bigger lead than previously, 16 points. So I think most pundits wrote off ND awhile ago.

Anyway, if Rs hold Nevada and Arizona, which is looking more possible now, and only pick up ND, they will have 52 seats, but with a much tougher map in 2020 the Dems would have an excellent chance of flipping the Senate at that time.