i'm only going to say this once: wasting time impeaching trump is exactly that, and it's exactly the point. so, they're going to drag it out until at least 2022, when they lose at least the house because everybody's fed up with them for wasting their majority on impeaching trump.
so, yell all you want for them to do something substantive - it's pointless.
they'd rather lose their majority than use it.
and, if it wasn't trump, it would be something else...