Why did the Dems want to Impeach Trump and why were they happy when they did?

(or, did they? this stuff confuses me)

Dems just don't want us knowing what's going on.

Explanation:

They haven't impeached him yet, it has another level to pass through. They want to impeach him because they want Nancy in office, which will not be pretty, and the reason his impeachment trial hasn't gone all the way yet is because they are trying to edit the rules. Dems need to be slapped