Impeachment is defined by legal-dictionary.thefreedictionary.com as “A process that is used to charge, try, and remove public officials for misconduct while in office.“
According to law.cornell.edu, the impeachment provisions in the Constitution were derived from English practices, but with differences. They say the Constitution limits impeachment to “office holders, and judgments are limited to no more than removal from office and disqualification to hold future office.”
So how the heck can Trump be impeached when he is no longer in office? Words mean something, at least they should. If you run over a corpse in the street (unlikely, I know), you can’t be charged with murder. You can’t perform an abortion on a woman that isn’t pregnant. You can’t amputate an arm that doesn’t exist.
Unless, of course, you’re a Democrat.