Right, and you haven't heard a peep out of Mueller about any evidence against Trump or his campaign regarding  collusion with Russia because they haven't found any.  I'm hearing he's expanding his investigation to Hillary, Comey, and Lynch, where there is ample evidence.

But let's say for the sake of discussion that Mueller comes up with something on Trump that even Republicans think is impeachable, and Trump is forced to resign.  Where does that leave you?  Mike Pence becomes President, he's more conservative than Trump, and he's more popular among Republicans and the general population.  Trump's resignation would probably be the worst thing that could happen to the Democratic Party.  Pence is totally on board with Trump's policies, and is a polished politician.

Good luck with your efforts!