The Watergate scandal was simple to explain: Nixon’s staff burglarized Democratic headquarters. So was the Iran-Contra scandal: the Reagan administration secretly and illegally sold arms to Iran, first to free hostages, then, to fund the Contras. Precisely what is scandalous around Benghazi depends on whom you ask, and when. Which is a large reason that it seems to me more a political rallying cry in search of a scandal, than an actual scandal. This article covers most of the notions I have heard.