Wasn't this overridden by the 17 amendment?
Before the 17th, the only "place" to elect Senators was in the State Legislature.
After the 17th, this was changed to wherever voters voted for everything else, in diverse and numerous places.
The 17th amended Article I Section 3 Clause 1: "The Senate of the United States shall be composed of two Senators from each State, chosen by the Legislature thereof, for six Years; and each Senator shall have one Vote."
Maybe you see something that I don't?
-PJ