Volker and Morrison were supposed to be the Republican witnesses for the President. Every witness so far, including Volker and Morrison have opined that the "Crowstrike theory" is a hoax and a false conspiracy theory to deflect from blaming Russia for election interference and has now basis in fact. Russia hacked the DNC server, and the Biden firing of the prosecutor was done in accordance with stated public policy in all of the free world, at that time.
If these are the best witnesses that the President has, he's in big trouble. It was especially delightful yesterday that when Jim Jordan attacked Lt. Col. Vindland, his response was to read his latest performance review out loud. Trump's attack dog keeps getting his ass handed to him on a plate. Yes, let's get the guy who "started it all" in for testimony. I agree, but I don't think President Trump will come.