How about the present POTUS?
Even if Issa only was needed to get the impeachment ball rolling, Obama's done plenty of impeachable crimes apart and aside from Fast and Furious.
No, there's more than enough [WRT F&F] right now to justify more than just 'investigation.' (It was a violation of treaty w/ Mexico, state-sponsored terrorism, and an act of war; all these facts are known and, while not forthrightly admitted, not denied.)
This is just the final stage in the "look, we're doing something" political tap-dancing play for this outrage; that's all it is, a 'release valve' so that people with a sense of justice can be told "we're doing something about it" when the reality is that they are not.