Updated at 7:35 p.m. ET
Senate Majority Leader Mitch McConnell told a group of Senate Republicans late Tuesday that he does not yet have the votes to stop Democrats from calling witnesses during the impeachment trial of President Trump, according to people familiar with the discussion.
But even as McConnell made the concession, the dynamic remains fluid. Whether Democrats' push for witnesses succeeds or fails could come down to a group of moderate Republicans who have remained open, but uncommitted, to new witnesses since the start of the trial.