[mmichaels1970]

I think the big question in the early post election days - at least for me - was 'OK, this or that court says 'oh yeah, probably fraud, not a valid result' -> but you can't recount because the evidence has been destroyed or doesn't exist. So what's to be done?

I think you invalidate the state results, then leave it to the state legislature, who are duly elected representatives of the residents, to vote for the electors.

[Oklahoma]

You are correct.

The legislatures of the respective states are the ultimate authority on which set of electors represent the state in the Electoral College. I believe the US Supreme Court ruled as much in 2000.