Because of the word “returns” in Section 5, what is true of elected Senators is equally true of appointed Senators. According to the Oxford English Dictionary, a “Return” in the time of the framers involved a report of an appointment made by a sheriff or other official. If the Senate may refuse to seat a person picked in a corrupt election, it likewise may refuse to seat a person picked in a corrupt appointment process. (Alternatively, we might think of an appointment as an “election” by one voter.)