Hmm... The article says: "On July 6, 2020, the U.S. Supreme Court ruled unanimously in both Chiafalo v. Washington and Colorado Department of State v. Baca tha

Hmm... The article says: "On July 6, 2020, the U.S. Supreme Court ruled unanimously in both Chiafalo v. Washington and Colorado Department of State v. Baca that states may enforce laws to punish faithless electors." Is that what you mean? That seems like a "may" rather than a "must", and also talks about punishing them afterward rather than about voiding their vote.