i think occams razor would indicate the reason rosenstein hasnt been fired is the President doesnt want him fired. Why he doesnt want him fired i have no clue. That being said we just have to trust the President even though this stuff can make your head explode.
Rotten rod has not been fired for the same reason Mueller has not been fired, they’re being protected by ALL the usual suspects and corrupt parties including the GOP.
Using Occams razor argument is usually the lazy man’s way of arguing without thinking.
If Occams razor is true, the sun revolves around the earth, and of argument.