What color code do we assign to Chertoff's "gut feeling"?

Here is an excerpt from a letter sent to Michael Chertoff by Homeland Security Committee Chairman Bennie G. Thompson:

Words have power, Mr. Secretary. You must choose them wisely—especially when they relate to the lives and security of the American public. What color code in the Homeland Security Advisory System is associated with a “gut feeling?” What sectors should be on alert as a result of your “gut feeling?” What cities should be asking their law enforcement to work double shifts because of your “gut feeling?” Are the American people supposed to purchase duct tape and plastic sheeting because of your “gut feeling?”

It is an almost unbelievably irresponsible thing to say. Why would Chertoff frighten Americans because of an unsubstantiated feeling? It just seems to be another attempt to manipulate the emotions of our citizens. And I would expect them to be investigated to the fullest extent of the law.

And if something actually does happen after we have been given this warning, it would make Chertoff, Homeland Security, and our government the most likely suspects.