Poll: Obama has 20-point lead over Romney among women

In the March survey, Obama led Romney by 31 points among women younger than 50 (64% to 33%), and had a sizable advantage among women 50 to 64 (58% to 36%). But Romney ran about even with Obama among women 65 and older (48% Obama, 49% Romney).

Among men, by contrast, there were no significant differences by age: Obama and Romney ran about even in all three age categories.

Obama led Romney among women in all three main income categories, including those with family incomes of $75,000 or more. Romney held a slight edge among men with incomes of $75,000 or more.