Here's what at least one legal scholar says about it:
''The downside for Trump is that his presidential pardon power does not extend to state crimes — for the same reasons that underlie the dual sovereignty principle. Mueller, of course, knows this, and may be setting up the infrastructure to allow Schneiderman to pursue any prosecutions in the event he can’t – or to conduct them simultaneously.''
Asha Rangappa is a former special agent in the Counterintelligence Division of the FBI in New York City. She is currently an associate dean at Yale Law School.
http://thehill.com/node/348989
