While I do think the majority of sexism is gone from America, I think a bit still lingers, and this is on both sides. Simply put, women of the political age were raised in "Father knows best" homes, and its only now that more modern women are started to emerge into the political scene. I don't think you can just blame "the man" for bring women down, as I think that the mentality of ladies were like "well politics is a man's thing" for a long time. Kinda like how my mom (who is as liberal as can be) still says taking out the trash is a man's job. It just a mind-set that we're starting to get out of. Once the older generation start to retire and the newer ones become more ambitious then I think you'll see more girls on the scene.
(Through, if we treat all of them like the media treated Sarah Palin, then I think they'll be a reluctance for more women to throw their hats in)
What i absolutely despise is that when there's been a bad female leader - like for example, Margaret Thatcher (since i just posted about her). I heard some bloke say "well, that's the last time i'm voting for a woman PM". I slashed him completely, very aggressively and disparagingly. I mean, Tony Blair was quite sh**, and i don't hear anyone going, "well, that's the last time i'm voting for a man PM". Why? Because there's still an undercurrent of sexism in Britain, and there's plenty in America too.