Those numbers must, I think, be slightly underestimating the size of the black vote in MS. But certainly the winner in MS is not in doubt.
Assuming that there are no "others" in Mississippi (which there are, maybe 1-2% of the vote maximum which votes Democratic but at nowhere near the black level, but we'll ignore it here), this sample translates into about a 64% white, 36% black breakdown.
Non-white voters were 35% of the vote according to exit polls in 2004. Blacks are 37.1% of the vote, as of 2006. With non-white voters total, you bump up to about 40%, but these are low-turnout types of people (the other non-whites).
I have personally said that I don't think non-whites can be higher than 40% of the vote in MS, but even in that situation whites would need to be underenthused. If whites are normally enthused, I expect 38%. If they're highly enthused, I expect 36%. Given what's presently going in the race, etc., I expect the latter two to be more likely to happen now (whereas I may have thought the first two earlier).
So adjust if you wish or want to, or don't.
