>>Sorry pal - it’s in the constitution. States have exclusive rights to determine their voting laws - including electors.<<
The SC just made that ruling in October of last year, Gorsuch wrote those very words in the decision.
The last election saw multiple state violate that by allowing governors, judges and secretaries of state to enact new voting rules.
The governors throwing open mailin ballots is different - in almost all cases it was a violation of those states laws - but were approved by those states supreme courts.
For better or worse - the SC punted because they didn’t want to get involved in the state’s sovereignty.
We’ll see if they change their tune now...