Solyndra and Fast & Furious definitely don't qualify as "major" scandals, which I interpret to mean Teapot Dome/Watergate/Lewinsky- level (did Iran-Contra turn that key?) Key 5 we probably won't know for several months. I suppose Key 8 could turn if Occupy Wall Street continues and escalates into something more serious.
The scandal key requires that the events directly touch the President: What did he know, and when did he know it? It's not at that point now.However, there is a back door to the scandal key, and that is if there is a widespread appearance of cabinet-level scandal; the "mess in Washington" that affected Truman's full (ie 2nd) term was enough to turn the key for 1952. Here is a description of those events from the Truman Library as told by newspaperman Gould Lincoln.
