Ban voting machines and use paper ballots only. Even as a kid, I always thought "voting machines" looked like a crook's game.
Declare the RATs to be a criminal organization, and deny them any inside access to election operations. You wouldn't let the Mafia run an election would you?
That could work but somewhere along the line computers are going to come in to play. We have to be able to make sure that computer fraud does not keep electing candidates on the left.
That's a good start. But there are a lot of states already using paper ballots (e.g. here in Virginia. The problem is tabulating machines especially in Dem jurisdictions where they can play around with configuration, feed ballots multiple times, purposely alter Trump ballots so they can't be read, etc. In theory we can catch those shenanigans with a hand recount plus ballots inspection. In reality they will never allow a non-fraudulent. recount.
People develop and run a system.
We have to enforce the penalties for treason