department. sessions is already recused from this investigation. officials from the president on down blame rosenstein s decision for making the controversy over russia to only get worse. we ll learn soon whether mueller s investigation forces rosenstein to step aside. back to you. evan, thank you very much. let s bring inn errol lewis, sarah westwood and our cnn legal analyst. joey, let s start with you. rod rosenstein sent this standard with the interview with the a.p. earlier this month, he said if anything i did winds up being relevant to mueller s investigation, i will recuse. he wrote the letter on which the white house initially said that the president based his decision to fire comey. is this a question of when and not if now? it absolutely is. this is an investigation about