Men.
Yes, for American men -- most of whom would be very nervous voting for a woman C in C if she were not reputed to be a major badass. This is one of several reasons Hillary can be elected, despite the fact she is a woman. Another is that, like Barack Obama, she is an insider. No one who is a genuine outsider (such as e.g. Elizabeth Warren) has any chance of being elected US president.
But the warmonger/badass image is not only for American men. Once Hillary is president there are men around the world -- heads of state, heads of gangs of thugs -- who think that a woman is automatically weak, and they will want to test her. If she has a reputation as a warmonger, with itchy fingers on the drone trigger, they will think twice. So, yes, bring on the badass imagery.
And all you Hillary haters who chorus that she is a warmonger are singing right on cue. Keep it up, please.