Can Greenspan Be Retroactively Impeached As Fed Chair?

That's what readers of this AP interview with Greenspan must be asking. Greenspan was asked about the crisis caused by the collapse of the housing bubble (inaccurately referred to in the interview as the "financial crisis). He responded by saying:

"A: The problem is that we didn't know about it [the growth of the subprime market]. It was a big surprise to me how big the subprime market had gotten by 2005. I was told very little of the problems were under Fed supervision. But still, if we had...