Congressional Hearings on the S&P Downgrade?

Just a month ago I linked a WSJ story highlighting criminal charges levied by the Argentine government against private consulting firms whose economists had reported inflation data.  Now, Financial Times reports that the Senate is considering hearings related to S & P’s downgrade of U.S. debt.  Wow.  Does anyone, anywhere — regardless of their position on whether S&P was right or wrong to downgrade the debt — think this is a good idea?  (HT:  Lawrence Cunningham tackles the First amendment implications)