SMOGZINN
Lifer
The president definitely can't pardon state crimes.
I agree, but I'm almost certain that we are going to hear arguments otherwise if Mueller convinces state AGs to charge his staff with crimes. The argument is going to be that these crimes could have been charged in federal court, and based on the Ex parte Garland (1867) case where SCOTUS said that a Presidental pardon does not just commute the sentence of the charges it actually absolves him of the crime altogether, '....so that in the eye of the law the offender is as innocent as if he had never committed the offence." They will then argue that the State can not charge him with a crime that he has already been found innocent of.
It is pretty shaky legal grounds, but I have no doubt it will be argued.