I looked for your quote beginning "If adopted…" in any of your linked references and couldn't find it. Maybe I just missed it. I was hoping for some additional insight into the conclusion that "…this position would mean that state legislatures could subvert congressional elections without pushback from governors, state courts, or even state electorates".

Election subversion seems to me to be a stretch from clarifying the limits of State Legislature's authority derived from Article 1, Section 4 of the US Constitution which states "The Times, Places and Manner of holding Elections for Senators and Representatives, shall be prescribed in each State by the Legislature thereof…"

Times, places, and manners; not results.