They just won't both bother responding. I remember Adam Schiff's arguments during the senate part of the impeachment procedure - "Is there any doubt he did it?", there was no real response to this. Mitt Romney is now the radical amongst the congressional GOP.

The type of politicians who kicked the chair out from under their own leader during watergate are probably rare amongst democrats and non-existent bar one (https://youtu.be/qS-aFfJe20U) amongst these republicans.