Just saw this on Fox News. One Elector in CO and 3 in WA voted for Trump instead of Clinton.
They were all replaced and fined by their States for not voting for Clinton.
The SCOTUS decision could impact Electors in all of the blue States that now have the “popular vote” rule.
I read on Wikipedia “Faithless elector” the WA 3 voted for Colin Powell in 2016. I believe they were trying to influence other electors in red states to do the same in an attempt to hurt Trump.