If you want to make sure elections are airtight, just have Republican voters game the system in 2024 the same way the Democrats have in the past. This is already happening in California with its stupid "ballot harvesting" law ... which is why the GOP has been successful in recapturing House seats it lost in 2018 there.
So then that boils down to the real question. If laws are made at the state level and state election officials can violate them, what the point of SCOTUS? The law is the law they are final arbitors of law. Doesn’t have an “* void if it concerns elections.” SCOTUS can find gay marrage rights that dont exist. Baby killing rights when it doesn’t exist, but can be bothered with violations of Constitutional protected states legislature rights to make election law when it does exist? That dog dont hunt.