“There was even racial dissension over Mr. Obama’s wife, Michelle: She was viewed favorably by 58 percent of black voters, compared with 24 percent of white voters.”
From a front page story analyzing poll results in The New York Times.
What the article doesn’t say is that only 20% of the whites surveyed viewed Mrs. McCain favorably.
Time polling expert Jackson Dykman. He also had this (and more!).