The U.S. Senate remained at a stalemate on Friday over how to proceed with the impeachment trial of President Donald Trump, as the chamber’s leaders wrangled over whether White House aides will be called as witnesses and the top Democrat appealed to a handful of Republicans who could help break the impasse. After a two-week holiday recess, there was still no clarity about when Trump’s impeachment trial might begin. Senate Majority Leader Mitch McConnell, a Republican, said that in any case the trial could not start without the articles of impeachment, which House Speaker Nancy Pelosi has not yet sent to the Senate.
