Senator Lindsey Graham. (Tom Williams / CQ-Roll Call, Inc via Getty Images) South Carolina Senator Lindsey Graham is a juror in the impeachment trial of Donald Trump—and a witness with firsthand knowledge of one of the highest crimes committed by the former president on January 6.1 Even as the ranking Republican member of the Senate Judiciary Committee now tries to defend his partisan ally, Graham’s past statements indict the president. In interviews he gave immediately following the violent attack on the Capitol by the crowd Trump incited to insurrection, the senator recalled conversatio...