The impeachment trial is hurtling toward a conclusion, after brief drama over potentially calling witnesses. Former President Trump is almost certain to get acquitted, but it won’t be much of a vindication.His conduct in the post-election period and on January 6 will blight his reputation forevermore. He waged a dishonest and poisonous campaign to overturn the election that culminated in a mob disrupting the counting of electoral votes at the U.S. Capitol on January 6.The new videos played by the House managers at the trial brought home again the national embarrassment of that day, with top elected officials scurrying for...