Well, a gender gap like that isn't special to the US.
We have the same in Canada and I suppose elsewhere.
Easy to explain, because the women are usually poorer than men and have more "social" jobs (nursing, etc...) which make them see the sad life of poor people, while more men are in leadership positions, where they see more benfits with right-wing positions.
I always thought it was because women vote based on emotion more than men do.
Tell us more about how women's brains work.
Indeed. It probably deserves a vanity essay placed on the Community Forum actually.