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Wal-Mart's diversity data shows that the company's workforce, and in particular its vast army of sales associates, looks an awful lot like the Democratic base.
It is disproportionately African-American. African-Americans are about 11 percent of the American population and vote overwhelmingly for Democrats. According to this CNN exit poll, they went for Kerry by an 88-11 margin in 2004. But African-Americans constitute nearly 17 percent of Wal-Mart's employees and 18 percent of sales workers. Encouraging more middle- and lower-income African-Americans to vote in states like Arkansas, Oklahoma, and Mississippi would almost certainly be a net positive for Democratic candidates.
We know, as well, that women tend to vote disproportionately for Democrats. In 2004, according to CNN, women (and working women) voted for Kerry by a 51-48 margin. Women are substantially overrepresented in Wal-Mart's workforce. About 60 percent of all employees are women. And three-quarters of its sales workers are female—a higher proportion than at other retailers. All things being equal, more women voting will boost Democratic candidates.
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http://www.slate.com/id/2151043/?nav=tap3