I would like to apologize in advance for the rampant misogyny in this article, that being said:
I know what you're thinking: "So what Dan. Bitch's be crazy! You know that." (I would like to pause for a brief moment to propose the radest campaign slogan ever: "Obama: You Know Bitch's be Crazy.") But seriously a woman crying is possibly one of the most powerful weapons in debate, presidential or not. Let's put it in a situation that we all can understand.
Let's say my girlfriend is nagging me about how "I'm always at the strip club," and how "I should stop bothering her at work," and "why don't I ever want a lap dance from her," and then I go all stone cold gangster on her and teller we should break up and she starts crying. Before I know I'm consoling her like a victim of spousal abuse, "I'm sorry baby; I just get a little crazy sometimes. It'll never happen again, I just get crazy sometimes. Hey let's go get ice cream." You see what happened there? Knowing that most political officials are men, both at home and abroad, let's apply that same theory to politics and the presidency.
Let's say Hilary is the president and she's at a summit to end Darfur. The Janjawid guy will probably say something like "there can be no peace until all of the tiny starving African children are dead!" or something evil like that. But then Hilary starts crying, and the spouse abuse mentality kicks in, and the representatives on both sides are like "I'm sorry Mrs. President. We just get a little crazy sometimes. It'll never happen again, there will be peace between us. Let's go get some ice cream."