I am not sure how much more it would take to open a DCA base right now. We operate a lot of DCA flights right now as it is - more flights than we do in some of our bases. That is the obvious choice, and it would give them reserves in one of our busiest airports.
I hope it is not DCA. I really like the DCA overnights and the DCA flying. It is a relief sometimes to pick up a DCA 4 day trip and stay out of CLT. It is a nice change of pace.