I think any female competent to be the President of the United States would be morally repulsed by the idea that she could be elected due to affirmative action. Real women of character are to be judged on their own worth, independent of their gender. No qualified female candidate would accept the nomination as her party's candidate if she believed that she was only nominated because of her gender. It's an insult to women everywhere.
That said, I don't think America is quite ready for the idea of a female President.