 Pete Domenici, Robert Byrd, Strom Thurmond, Thad Cochran, just Dianne Feinstein most recently, just to name a few, seemed to hang on longer than they should have and didn't leave after they had had serious health problems or questions really raised about their fitness, their mental state, all that. They would hang on for six months, two years, four years sometimes after it was clear that there was something amiss.