All the media reports and news cycles have made mention of the most important campaign 'story' out of the South Carolina Democratic primary--blacks (comprising more than half of the state's electorate for this contest) overwhelmingly voted for Obama, at rates almost as high as blacks vote for Democratic candidates and against Republican candidates in general elections.
Obama took just under four-fifths of blacks. He again won as strongly among black females as he did among black males. Whites voted against Obama nearly as heavily as blacks voted for him--he took 24% of that vote.
While the media stories are generally portraying this as a big win for him, it seems to me that it's the end of his Presidential run. He's become the black candidate, and if that needs reiteration, Obama's relationship with the Reverend Jeremiah Wright has now been 'publicly' exposed (nearly a year after Steve Sailer began released his exposition of Obama's past) and will be readily pointed to by Clinton surrogates.
It's tiresome conjecture over the intent, I know, but Hillary's 'controversial' MLK comment now looks tactically to be quite sound.
Outside of that, identity politics reigned once more. Edwards, who only garnered 18% of the total vote, easily won among white males (45% to Hillary's 28% and Obama's 27%). Hillary won among white women, and of course Obama cleaned up the black vote.
Also of interest in the exit polling is how Edwards was again, in spite of his 'two Americas' theme, the patrician's candidate. The percentage of each candidate's supporters who came from families with incomes of $50,000+ (just under half of the total electorate):
Edwards' supporters were also more likely to have been college graduates than either Obama's or Hillary's were.
In contrast to his performance in the whitebread states of Iowa and New Hampshire, Obama actually did slightly worse as incomes increased. Unfortunately, blacks were not broken down by income group, but as more than 80% of Obama's supporters were non-white, the trend proxies pretty well for how he did among blacks at various levels of income (I suspect among whites Obama supporters were again better off financially than at least Hillary's, which probably means that among blacks his support was at about 80% irrespective of income level). It appears that, contrary to the uncertainty less affluent blacks felt towards him as recently as a couple of months ago, members of the community from across the economic spectrum stand behind the (unwillingly) black candidate.
Obama's tragedy is that, in becoming the bona fide representative of black America, he has all but forfeited his chance at the '08 Presidency. One can only wonder how this unfolding sequence will affect him.