By and large, the Secret Service does not publicize a great deal of information about assassination attempts on Presidents, probably because they do not want future would-be assassins to learn from the mistakes and successes of their predecessors, I would imagine. Some information (Wikipedia warning) does make it out to the press, of course, but I somehow doubt that is all the information, much less all the incidents.
With that said, I am going to go out on a limb and hypothesize – and this post is nothing but a wild-assed guess, based on absolutely nothing but my own imagination and a healthy dose of intuition – that within the next four years, there might be a highly-publicized, covered-from-every-angle, attention-grabbing, breaking-news kind of attempt on Our Glorious President’s life, or that of his lackey (which, actually, now that I think about it, seems more likely). I will further hypothesize that the attempt might be made with firearms, of the "evil black" variety.
There is no evidence whatsoever to support this suspicion of mine, I am entirely guessing, this post should not be construed – in any way – as a threat against anyone (Seriously, if I was planning on killing anyone, do you think I would be stupid enough to post about it online? Give me some credit.), and I will be quite happy to be proven wrong… but I guess we will see. I, for one, as a law-abiding American, am concerned for our President’s safety, and would hate for anything to happen to him.
What? Everyone is thinking it – I am just saying it.