While grappling with procrastination, I came across these wonderful statistics for the US Presidential elections:

http://edition.cnn.com/ELECTION/2008/results/polls/#USP00p1

Some nice figures I got from it:

                 Obama          McCain   Other/No Answer

While Obama had a sizable majority among poorer people, he did not have a majority among the higher incomes. In fact, a different income breakdown shows he had a sizable lead (~6%) in the highest bracket polled, Income>$200,000. This seems to suggest that even though traditionally you could say that the more money you had, the more Republican you tend to be (lower taxes mean more when you have a large income), it seems that this was not a deciding issue in this election.