As you will. Personally, I hate pseudo-rules like this, because they encourage complacency. If you believe that Hillary Clinton cannot be elected President because of some silly "expiration date", you won't be motivated to fight against her because she can't win anyway. It's dangerous.
And by the way, here's some helpful advice which you are of course free to ignore. As bad as Hillary Clinton is, as much as I fear the prospect of her as President... Hitler was worse. A lot worse. Calling her "Hitlery" isn't clever, it's juvenile. You know how the lefties call the President names like "Chimpy McBushitler?" You know how stupid they sound when they do it? Well, that's you.