Commentary Although I am very willing to believe that the impeachment trial of former President Donald Trump is unconstitutional, it seems to me a mistake for Mr. Trump’s lawyers and supporters in the media to have begun their case by arguing for a dismissal on these grounds. For one thing, it gave the prima donnas of the Republican caucus in the senate an opportunity to curry favor with the media by voting against dismissal without voting (as yet, anyway) to convict. A vote for conviction, as they well knew, could get them in a lot of trouble back home, whereas a vote only to proceed with the trial could be represented as a kind of half-way house between conviction and acquittal. They must have welcomed the chance to pretend to a fair-minded willingness, as Liz Cheney carefully put it after she got in trouble back home for voting for impeachment …