I'm no con-law expert either, but the president does nominate directors for the CIA & FBI. Presidents have asked these directors for resignations in the past, no?
Yes.
But after President Nixon's term in office (or should I say resigntion) Congress established a joint committee to supervise CIA operations which tightened congressional control over the CIA. This was done because congress discovered that the the CIA had illegally broken into the homes, tapped the phones and opened the mail of American citizens and accumulated information which had been passed on and used by presidents for political purposes.
