I just find it humorous that you have a stark inability to ever admit you were wrong about something. Sorry for picking on you.
Just because you are desperate to have whatever little gotcha moment you can scrounge up doesn't make me wrong.
Well, you were though. You said that impeachment proceedings were the same thing as a criminal investigation. Its not. Ergo, you were wrong. It doesn't matter what kind of contextual padding or re-arranging you want to do, this statement remains incorrect:
The Nixon impeachment was based upon the criminal Watergate incident, so yes, it was a criminal proceeding.