Pelosi is playing a very smart game.
I told someone way-back-when that I didn't think Trump would be nominated, but if he was, it would change the Republican party completely. I think we're watching its very slow demise. They are not running for re-election, or they are being defeated in surprising places, and while Trump's brain-dead followers are loud, there aren't large numbers of them.

I think the "win" in the impeachment business is simply tacking the shame of it onto him. I think the Senate will say the criminal activity is fine, just fine, and everyone will see them do that. I don't know if that will change anything, but it's certainly going to stick.