Main Winning Argument Moore v Harper

Key GOP radical idea:
State Legislatures can overturn any Presidential election result they don’t like.
 
Key winning oral argument against by Neal Katyal:

It is rejected by the Articles of Confederation, rejected by the early state constitutions, rejected by the founding practice, especially, New York where judges vetoed federal election bills. It’s also rejected by this court, and cases such as Smiley and Hildebrandt.