You really think the wording of the vote to authorize witnesses will be “only democrat called for witnesses, no Republican or defense witnesses”? I hadn’t thought of that, thanks.
Yes, Dems have already said Biden, etc. are not relevant to impeachment. It’s not a leap at all to think the useless GOP Senate would do the same. That is why POTUS is now publicly saying he wants a dismissal with no trial. He simply does not trust the GOP Senate.