This was in the field Monday through Wednesday, through Dorgan's Tuesday retirement announcement:
Research 2000 for Daily Kos. 1/4-6. Likely voters. MoE 4% (2/9-11/09 results)
Dorgan (D) 37 (57)
Hoeven (R) 54 (35)
Um, yeah. That's why Dorgan retired. Last February, Dorgan was winning independents 69-19. This week's poll, he was losing them 33-54. Note that Dorgan's numbers got worse after his retirement announcement. He was losing Wednesday's sample by 57-31, so these numbers are exaggeratedly bad due to his mid-poll announcement. But still, it was looking tough assuming Hoeven got in.
We're back in the field next week in North Dakota (along with Connecticut and Colorado), so we'll have a new look at the land with a new slate of candidates. Chances are, this will be a lost cause for Democrats.