You got it right.
The part you left out (perhaps the reason you are lost) is the horse race.
It's a race to get President Trump removed before he can finish exposing Biden and the rest. They figure if they can oust Trump, then the investigations will end and the news will be about Trump "and his GOP enablers and co-conspirators," allowing their weak slate of 2020 candidates to win.
If Trump beats them to the finish line, they are done. None of their candidates will win, and they may lose seats in the Senate and the House.
That's what this impeachment is, a cunning election strategy for 2020.
Alexander Hamilton wrote about it in Federalist #65:
...the decision will be regulated more by the comparative strength of parties, than by the real demonstrations of innocence or guilt... the most conspicuous characters in it will, from that circumstance, be too often the leaders or the tools of the most cunning or the most numerous faction...They don't get more cunning than Pelosi, Schiff, and Schumer.
-PJ
Yep, and we saw this awhile back. It ‘IS’ their Campaign...and Schiff recently announced it by saying “The election cannot be won at the ballot box”.... So their next phase is their drive about the election 'process' .....that the rules need to be changed, that all illegals should be able to vote, that the electoral college is absolete, and of course the russia russia cry..... I'm convinced they couldn't care less what happens in their primary...they've been working to get Trump off the ballot and will continue doing so... which is there plan to win in 2020.
Convicted traitors are hanged, spies are shot, saboteurs are subject to summary execution.