Listen to President Obama and Mitt Romney on the campaign trail, and you could be forgiven for briefly thinking only one gender is allowed to vote. Both candidates regularly tailor their message to female voters: You can see it in the president's attacks on Romney's desire to cut Planned Parenthood funding and potentially appoint judges to overturn Roe v. Wade, and in Romney's claim that "this president has failed America's women" due to an uptick in female poverty. There's a reason for this: Women are widely perceived as more likely than men to be swing voters. In the battleground state...