You do realize that "districts" are federal, right?
Also, while the
President's pardon power extends to "offenses against the United States," it's actually not clear what the effect would be on state prosecutions because the Court hasn't fleshed out the nuances yet.
Commentators on the Left often state, in conclusory fashion, that "presidential pardon power does not extend to state crimes." However, the Supreme Court has held that the President's pardon power is "unlimited," and "extends to every offence known to the law."
Ex parte Garland, 71 U.S. 333 (1866). This "power of the President is not subject to legislative control," and a "pardon reaches both the punishment prescribed for the offence and the guilt of the offender . . . so that, in the eye of the law, the offender is as innocent as if he had never committed the offence."
Id. at 380-381. Because state and federal criminal law now overlap significantly, the Court would probably have to consider whether the elements of a pardoned federal crime are coextensive with a state crime. IMO, a Presidential pardon would have to reach all offenses except those which are distinctly state law offense (e.g. burglary, assault, etc.). Whatever approach the Court uses, it is doubtful that it would allow states to do an end-run around the President's pardon power by allowing them to prosecute the same exact conduct under state law.