What do you think the reasons why fewer women than men are elected to political office? Is it that women are less interested in running? If so, why?

What do you think the reasons why fewer women than men are elected to political office? Is it that women are less interested in running? If so, why? Is it that voters are more likely to vote for a man? Why? And, finally, I would like to hear your opinion about the chance of electing a female president in 2016