Impeachment doesn't need to "work" to be a process that lays out the treason, bribery, and high crimes & misdemeanors of our current president well into the election; not to mention force vulnerable senators to impale themselves defending him up to and including Moscow Mitch.
The House won't even get a chance to finish their proceedings before the Senate will be bombarded with questions and the real problem for trump, the thing that will drive him the most insane, is that it will be a source of daily news.