After decades saying that, “It wasn’t their job,” and that it, “Couldn’t be done,” the Federal Reserve is now casting itself as the nation’s premier bubble fighter:

Not so long ago, Federal Reserve officials were confident they knew what to do when they saw bubbles building in prices of stocks, houses or other assets: Nothing.

Now, as Fed Chairman Ben Bernanke faces a confirmation hearing Thursday on a second four-year term, he and others at the central bank are rethinking the hands-off approach they’ve followed over the past decade. On the heels of a burst housing-and-credit bubble, Mr. Bernanke now calls financial booms “perhaps the most difficult problem for monetary policy this decade.”

The money quote, which follows, is that, “Mr. Bernanke wants to use his powers as a bank regulator to stamp out bubbles, but the Senate Banking Committee, which will grill him later this week, is considering stripping the Fed of its regulatory power.”

Ben Bernanke does not want to stamp out bubbles, he is just trying to give members of Congress an excuse not to clip his wings.