Much of the credit for Obama victory has gone to his "expanded electorate," the surge of support from minorities and the young. These two previously unengaged groups were integral to his victory, but not crucial. It was the most affluent 5 percent of voters who gave Obama his margin of victory in November.While not having had dissected the statistics from the November election results myself, I can rely on my past experience to tell me that I could probably take a look at the stats and find a demographic (or cluster of like demographics) other than "the affluent" who might have given Obama his margin of victory.
And my argument would be just as supported by the data as Kleinhieder's as published in the City Paper, since he provides no warrants. He appears to expect you to take his interpretations on faith. And don't you dare ask how he operationalized "integral" vs. "crucial."