Ok, i'm going to go out on a limb here and make a prediction. Ready?......
1) Trump will not be impeached. (The crowd goes wild with riotous applause and many celebratory gun shots)
2) IF the investigation turns up sufficient evidence from the Mueller investigation, Trump, who I believe is suffering a significant mental decline, will offer to resign to save himself, his kids and the Party the humiliation of impeachment and make a deal to save his kids from possible arrest and conviction (should that become likely).
3) He will slink off into relative obscurity for a brief period before he dies, or this twitter account is terminated, and there might be something left of the Republican party after the 2020 elections.
Now, print that out and paste it on your loading room wall. If I get 2 of 3 right, I think I deserve a Gold membership for life.
Addendum: The US Attorney for the Southern District of N.Y. might not be so inclined to deal. That might complicate matters considerably.