If the impeachment of Donald Trump seemed almost certain at the end of last year, his acquittal seems equally so. On Friday, the Republican-led senate voted 51 to 49 not to call witnesses. Until Friday, there had been some murmuring that McConnell didn't have the votes to block witnesses from testifying. However, by the end of the day, the two outstanding Republican senators he needed, namely Sen. Lamar Alexander and Sen. Lisa Murkowski both decided to vote against the motion to call witnesses. The rationale they gave so...