Romney has a problem with the male voters, too.

Obama leads, 48%-35%, among women overall and a whopping 56%-25% among single women.

But Democrats have traditionally had an edge with the female vote. More striking is the fact that Obama narrowly leads Romney, 44%-42%, among men. Romney led this group, 47%-42%, in March, but Obama led, 45%-43%, in February, suggesting that Romney is vulnerable among male voters.

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