Throughout the primaries Obama has done very well with black voters. However, he's also done very well with almost every other demographic (aside from the neanderbillies) at many points throughout the campaign.
And keep in mind that only 15% of Americans think we're on the right track. That doesn't bode well for mccain, who is promising a continuation of the same policies that the vast majority of America opposes.
Maybe if you got out of your bunker more often, you'd have a better feel for the pulse of the nation.