We should not have have top down dictates on what cases get prosecuted, that is insane. The President can give areas of focus, but average government employees are not military personnel, they should not be given 'marching orders'. Special envoys, etc, sure, but telling individual prosecutors 'drop charges against XYZ' isn't how our system should work. 'I would appreciate it if...' yes, but not 'Bob's our guy, drop the charges against him'.