Short TBT! Long TLT! The fed is going to pledge low rates, and they have the power to do it. Growth is at stall speed now, there's no catalyst for higher rates. A downgrade would actually make rates fall, because it would change the risk free rate of all asset classes globally, huge flight to safety.
TBT is looking very interesting down at these levels, I would be a buyer sooner than later on this one. I think its easily back to $32 in a few week on this one.