McCain leads in one of this years crucial voting blocks.
From the WSJ:
Pollsters have emblematized part of the crucial working-class swing vote as "Wal-Mart Women," defined as more socially conservative women who typically don't have a college degree, who are feeling the economic pinch and are shopping at Wal-Mart for its lower prices.
The rise of Wal-Mart's female customers as a sought-after voting bloc has presented the Bentonville, Ark.-based company with an unprecedented opportunity to help choose the next president -- and it's trying to make the most of it.
The political poll, conducted for the company by a bipartisan team of pollsters, isn't the first Wal-Mart has conducted, but it is the first it has made public, said Wal-Mart spokesman David Tovar.