nobody really knows what's going on except for the people involved.

You're switching topics. OP said nobody knows what Mueller is investigating, and you're saying nobody knows what criminal activity occurred except for those who committed it. Those aren't the same thing unless you assume (without the conclusion of Mueller's investigation) that a crime actually occurred.

Moreover, Mueller works for Trump. We have three branches of government. Legislative, Judicial, and Executive. Mueller works for the executive branch. He was not appointed by the Legislature or Judiciary. All of Mueller's authority derives from the fact that he's working on behalf of Trump. To say that the POTUS is obstructing himself is absurd. Yeah, maybe it would be great if no one were above the law, in the sense that there was always someone higher to enforce it, but we live in the real world. The best we can do is co-equal branches of government. If someone wants to hold the President accountable it has to be the other branches... As the SCOUTS has said many times, you can't punish a government official simply because you don;t like how he does his job. And Trump's investigation of Trump is his job. If Trump wants to stop investigating himself, that's not an impeachable offense.