The New York Times reports:
Senator Mitch McConnell, the majority leader, told a closed-door meeting of Republicans that he does not currently have the votes to block Democrats from calling witnesses at the trial because some Republicans remain uncommitted, according to people familiar with the meeting.
In making the statement, Mr. McConnell — who had with him a “whip count” of yes, nos and maybe votes — was trying to show his colleagues, many of whom are eager to bring the trial to a quick close, that they do not yet have enough committed votes to forestall witnesses.
But Mr. McConnell and his leadership team are optimistic they will to end up with the votes they need by the end of the week. They are trying to create pressure on wavering senators to join with a majority of their colleagues.