Is Trump going to Prison?

[HappySkeptic]

I read that the matter was debated when the 14A was being introduced. There's an exchange where senators ask the very question and the result was yes, POTUS is an officer.

edit - Boru posted it above

And yet I a lawyer on the radio claim that that "officers", by definition are not elected, but appointed.  I think he's wrong, but is there an accepted legal definition of officer?  If not, SCOTUS can make up any definition they like.