I think that your scenario is just a tad overboard. I think the real reason Obama has "risen" to the top is that his quality to be easily bought was recognized early. He has been bought and paid for and will perform on command. A very small investment for potential very large return on that investment.
Perhaps it’s overboard. But, I can’t discount the possibility that there are people in the world who are devious enough to either be pulling his strings to these ends, or would make an attempt on his life to try and ignite a firestorm in this country even if they have nothing to do with his campaign. If someone like Bin Laden wanted to really hurt this country, taking out Obama if he’s elected could do it.