According to the ACU, Wellstone is the most liberal member of the Senate (worst than Kennedy or Leahy).
Anything would be an improvement. I'm from the wing of the party that doesn't write half the country off as being too liberal to win in - we have Gordon Smith in Oregon and Rick Santerum in PA as examples where we have won in places "too liberal". I don't believe in symbolic victories either. You have to win elections to set the agenda. We must WIN more elections.