I realize that this race is not the same as the Kentucky gubernatorial race, but my point is that I'll believe that a Democrat can win in a southern state other than Virginia or Florida again when I see it. This year and last year, we saw that Democrats (often moderate ones) simply could not win in southern red states, even if their opponent was deeply flawed.
Edwards might be over 50% right now (if the polls are accurate), but there are still two and a half weeks left. I'm guessing Republicans will come home for Vitter, even if they won't admit to voting for him in polls. Edwards could pull off a win, but I'm highly skeptical of these numbers.
La has had two Democratic Senators before and have a higher number of blacks concentrated in New Orleans. Bel Edwards has a better chance than Conway.