Lamar Alexander made a late-night exit moments before dropping his decision

7:49am PST - January 31st, 2020    bombshell - CNN

There was a reason Sen. Mitch McConnell was smiling as he left the US Capitol just before 11 p.m. Thursday night. The final stage of the impeachment trial of President Donald Trump had arrived at last, thanks to one of the Republican Majority Leader's closest…