Wrong. The constitution stipulates that states must legislate election rules changes per national elections.
No, it doesn't. Repeating that stupid claim doesn't make it any less stupid.
All the Constitution says is "Each State shall appoint, in such Manner as the Legislature thereof may direct, a Number of Electors ...". That just says that states choose their election laws. It in no way states or implies that every tiny detail of election has to be specifically legislated, and every tiny change has to be re-legislated. That's why the legislatures gave that power to election officials.
So, tell us, which lawsuits were filed based on that crazy claim? I know the Texas lawsuit was, but the SC tossed that one for lack of standing. Very rightfully, since one state has no business telling another state how to run its elections. The Constitution is clear on that.