The right’s comparison of Trump’s impeachment to the infamous Cadaver Synod has it completely backward — In 897 A.D., a proceeding that has been called the strangest trial in history, the Cadaver Synod, took place in Rome. The late pope Formosus, the first and last of that name, was disinterred from his crypt, dressed in the papal vestments, strapped to the papal throne, carried to the…