I refer you to the statements made by the DNI to Congress, or Obama to Charlie Rose.
Furthermore, the media concocts completely fabricated narrative hung upon zero to minimal facts all the time, to devastating effect. I refer you to the whole Snowden's girlfriend thing, or the Martin/Zimmerman thing, or the recent "google something and feds arrive" thing.
It's all made-up bullshit that people buy into en masse. It causes them to become so passionate about their adopted stance, even contrary factual data later will be ignored.
Public opinion _will_ be managed, and policy _will_ be changed as a result. This is the playing field we stand upon today, like it or not. (Personally, I hate it - but I do not deny the state of affairs.)
The enemy has demonstrated a willingness to lie endlessly to obtain and sustain illegal power over us.
The path is clear. I vastly prefer to be effective than unimpeachable.