Great move by FOX.  At almost age 70, O’Reilly did not have a lot of time remaining at FOX.  It was best for him to leave while on top of cable TV programs and be replaced by the young (50-year-old) Carlson who has already amassed a large following for his dynamic, energetic, hard-hitting and no-nonsense program.   He not only will replace O’Reilly in the time slot, I believe Tucker Carlson Tonight will quickly become cable television news’ most popular program.