Witnesses attest to truth. If the GOP does not wish to have witnesses present it simply means they are afraid of truth. After all, much time is spent on clean up within the current Republican Party and this Administration. Just like the discovery of the tape between the President Trump and Parnas, truth is truth no matter where you find it. I believe most Americans wish to know the truth. The truth is blocking witnesses states volumes about the GOP. It will not be a moment they will be proud of, however.