Historical footnote that is not news to 'jimbokun but which I get the sense might be news to some of the people in this thread: the last time a President tried to interfere with the prerogative of their Attorney General, their administration collapsed as a result.
sigh
No, you still can't say that. Presidents cannot tell their attorney general who to prosecute or not to prosecute, even if the President thinks the person is a blatant criminal.
Maybe if you stopped to think about it a little bit, you would understand why allowing this could lead to very bad abuses of power?