Well, I thought the president line was intended as Dev humor not that he would ever get near him or die.
If it's then intended for him to die from this then yes, I certianly see it being a humanity hit.
Edit
Do you some how find out, he was killed looking for the president?
I certianly never got any indication he was killed or would be killed.
You clearly are taking advantage of him but I have always considered Humanity hit for threating someones life or killing them not playing a trick on them.
Certianly mean but Humainty?
Maybe due to playing D&D but the whole reason (afaik) to have Neutral aliments was to establish gray areas between Good and Evil acts and to me an Evil act is a Humanity hit.