The House under Pelosi's leadership can impeach and legislate – AT THE SAME TIME!
Republicans foolishly underestimated Pelosi - The Washington Post : "Trump and Republicans have spent months excoriating Democrats for pursuing impeachment, claiming it detracts from the business of the American people. Pelosi proved them wrong. She said during her news conference, 'We are legislating. As you know, we have been investigating. And we are litigating. We had two court cases in our favor yesterday and the day before on the use of funds, appropriated money for the wall, ruling in our favor.' The master legislator and master calendar manager made certain all the pieces came together at precisely the right time, thereby arming her members and undercutting a major Republican talking point. It is always a mistake to underestimate Pelosi’s control of her caucus."