One year ago today, Donald Trump was impeached by the House of Representatives. The outcome was foreordained: Nobody thought at the time that there were 20 Republican senators who would vote to convict. We can argue forever about whether the Senate should have removed Trump and how 2020 and the election would have been different with Mike Pence in charge, but as I argued here and here, with no clear-cut criminal offense, the voters evenly divided, and a presidential election impending, it was entirely in line with the design and history of our system for the Senate to acquit and …