[FreeReign]

So a sitting, elected member of the executive, based solely on his discretion, gets to reject electors voting for his opponent.

Yes he can. But there are other checks and balances.

The unhappy party can go to court.

And the court. looking at the Constitution, could look for and ask for valid certificates from the state legislatures.

Those framers thought of everything

You're right!

[semimojo]

And the court. looking at the Constitution, could look for and ask for valid certificates from the state legislatures.

In this case they already had them. And no state submitted alternates.