Good lawyers, with a bad case, can do presentations that make their positions seem coherent and arguable, or, if not that, can confuse an issue. If that had been done, the Republicans senators voting against allowing the trial to proceed on the grounds that it is unconstitutional, would have had some cover. The wreck of a presentation stripped away any cover -- they're voting against because they're afraid of Trump and his supporters, and they want to keep their jobs at any cost, no matter what that does to the nation and to democracy. To call them weasels is an insult to weasels.