"FOR ALL THE TALK OF HOW RELIGIOUS voters made Bush's victory possible, their performance didn't change from 2000 to 2004. Four years ago, those attending church once a week or more were 42 percent of the electorate and gave Bush 59 percent of their vote--for a performance of 25 percent (that is, 42 percent multiplied by 59 percent). In 2004, these voters were 41 percent of the electorate and gave Bush 61 percent of their votes, for a performance of 25 percent--no change from 2004.
By contrast, Bush improved his performance with voters at the upper end of the income ladder. Among those making less than $50,000, Bush actually lost ground, as his performance fell from 21 percent in 2000 to 20 percent in 2004. Among those making over $50,000, Bush's performance jumped 3 points, from 28 percent to 31 percent. And most of this improved performance was concentrated among the wealthiest of voters, those making over $100,000. In this group, increases in turnout and support for Bush raised the president's performance from 8 percent to 10 percent. In fact, Bush's gains among the wealthiest Americans account for a good chunk of his popular-vote margin of victory."
http://www.inequality.org/klinkner.htm