Based on the time-line for the last two attempted (not successful, just attempted) Impeachments and Removal, you don't have time. 

You need a viable candidate.  

Whining and crying and predicting the end of the world isn't going to do it before 2020.

And I don't think another '60's era hippy or any other septuagenarian is going to do it.

A positive program instead of just "I hate Trump!' might be helpful, too.  One that might get Independent or even (gasp!) Republican support.