Cokie (and her friend Nancy Pelosi) grew up in the halls of congress and learned her political chops at the knee of Sam Rayburn ones of the wisest and most effective politicians in congress. One of the first lessons she learned from "Mister" Sam was, "Always tell the truth, then you don't have to remember what lie you told." Her knowledge of politics, politicians, and the halls of congress is irreplaceable.
If we knew what it was we were doing, it wouldn't be called research, would it?
