Zogby admits to fudging his numbers!
1) Pressure from the left, and
2) Seeing the numbers showing Diedrich up by 4... in a poll with a 3.5 MoE... when he had lost previously to Herseth by just 1%. He said it gave him great pause. Diedrich up 4 is within the MoE of the final result.
I did not think my estimation of Zogby could get lower. It just did.