For a witness to be called to come testify before the U. S. Senate in an impeachment trial of president Trump, a simple majority of 51 senators would have to vote for that witness to appear, so Senate leader Mitch McConnell should put-up Shifty Adam Schiff and Eric Ciaramella (the “whistleblower”) to be voted upon as witnesses, in order to challenge senators Murkowski, Romney, and Collins to seek the truth.