They all involve death. Perhaps you should look deeper into the Johnson-Nixon transition.

They are all stinky.

You just want to be incensed about this one, and that's OK but don't think for a moment that the stakes aren't high and some are cleaner than others. Bengazi was certainly no worse than many others long forgotten, or perhaps never known about. If you want to believe it is the stinkiest, I doubt anyone will change your mind.