Cardcheck writ large? No thank you.
I could go for a thumbprint reader as part of the sign-in process. On line real time comparison to thumbprints given the same day. Try to vote twice, go to jail.
How about using a postcard sized card that you vote on and then before it is placed inthe box you put a physical thumbprint on it in front of witnesses.
Then after the cards are counted the thumbprints are scanned into a computer and they are searched for duplicates. Then your voter investigators investigate those matches and NAIL the bastards who vote fraudulently.
I would even like something like a “voting receipt” that mails you back a sealed card that shows how your vote was entered and if it doesn’t match who you voted for you can alert the election investigators and they can check for fraud.
You could use multiple cards, for elections.
Blue for “National Elections” (president, senators and reps)
Red for “State Eelctions” (State Reps, state issues)
White for “Local Elections” (Mayor, city / county issues )