Reread my comment. It can be investigated 100 times for all I care. May not change my opinion, but I'm not infallible.
But common sense would dictate that if something has been investigated ten times, it's stupid to write to your congressmen and ask for a first investigation. You've shot yourself in the foot.
So the way America now works, is that if anyone stonewalls long enough and obnoxiously enough, they're home free.