I think the dirty little secret is a lot of people are uncomfortable with a woman president. I even know male left-wing Democrats who say they don’t like the idea. Hillary being a woman will be a drag on her electability.
It has less to do with Hillary being a woman and more to do with her ethical baggage.
That is what caused her comfortable lead early in the night to shrink to the point of disappearing by daybreak.
IA is a personal repudiation of the invincible Clinton machine.
And she won’t take the humiliation kindly. IA was supposed to be an easy glide path to the coronation.