Why can't a girl be President?

Nikki Haley just lost her second caucus. She vows to go on. According to the "post game" panel discussions on every network, she will lose next month in her own state of South Carolina. Some say that she did NOT front load any kind of offensive against the "Rock star-Reality Star front runner, Donald T. Trump. In early campaign coverage, in a nation that favors the hoopla of "the trainwreck" Haley road the fence, choosing not to attack. Some observe that early on, she seemed to be hoping for a place in Trump's orbit or future administration.by going easy?? Well, her destiny appears to be in the rear view mirror regardless. So, WHY can't girls be President? The glass ceiling and surrounding glass walls in politics are obvious. Girls can hold other prominent positions. There are female governors. Female CEOs in Industry. Kamala Harris has quite the impressive resume in her career as a public servant. Hilary Clinton has lived an adult life in public service and with much experience in negotiation and foreign relations in particular. NO go. I watch too much TV. I admit. Watching Nikki Haley on screen is watching actor Julia Louis Dreyfuss in her role on VEEP. (HBO) I can't find Nikki Haley believable. I am watching another episode of VEEP. Will a woman ever break through? Will it happen in my lifetime? What has to happen?