It seems to me that the only way to target JUST the leader, is by assassination, because this particular leader isn't going to just dry up and blow away.

As we have an executive order that prevents assassinations of heads of state, perhaps the way to go about it is to have him removed as a head of state, then he would be fair game.

It is unfortunate, however, that there are some in this world who will not capitulate to negotiation, reason, or pleasant conversation. Those sorts of people understand nothing but violence, because they live violent lives.

Perhaps a round of Celebrity Boxing could decide.