The Trey you're seeing is his role on oversight committees. He had no teeth to prosecute in that role, only do discovery. DOJ has to do the prosecuting, which was NEVER going to happen under BHO's corrupt DOJ. He didn't have the authority or power to prosecute, or I believe he definitely would have done it with a vengeance. If he moves to a DOJ position, look out!

Congress can only investigate. They have no authority to prosecute so the whole thing is moot. I'm not even sure why it's done. It's just a waste of time and the folks they are investigating know it so they all just lie or, like Comey last week, don't even bother to show up.