I didn't read the whole thread so sorry if this has been covered, but I would like congress to start impeachment proceedings now under the "unfit for office" clause. Take the last 2-3 years of his lies, racism, betraying our allies, inflammatory behavior, disregard for intelligence reports, abuse of the media, etc. and put it all on blast in a much tidier package than the trickle of news. THEN, when/if Mueller finishes up and implicates DOTUS in multiple crimes, add the "high crimes and misdemeanors" clause to the impeachment proceedings.
I agree with you Hugo that there is value in getting the senate votes on record even if they do not impeach. I would like Trump to me removed sooner rather than later, but he's not going to win reelection and he will likely be prosecuted criminally anyway. So I don't think the calculus should hinge solely on whether they can successfully impeach.
And, as a counterpoint to Brisket, I think the likely outcome of all this is that democracy in the U.S. gets stronger . . . follow me on this. Many countries have shithead autocrats that they can't get rid of. What is going to happen here is that while we got played and elected this piece of shit, we will remove him at most four years later, clean up a bunch of corruption and election funny business in the process, and shine a spotlight on the deplorables. In other words, I expect the pendulum to swing back in a big way. No, we can't go back to the way it was before and there will be some long term damage, but change is the only constant and I expect a lot of good to come out of it in the end.
Switching gears, I hope there gets to be enough pressure on the senate to end the shutdown that they pass a bill without the wall and override any veto. It would completely emasculate DOTUS and be a good barometer for impeachment.
Edit: I should have read up ahead of time, but it looks like only the VP and cabinet can act on the "unfit for office" clause -- not congress. But surely congress can still do some version of the above.