I think that this played a big part in the 2000 election. Is there any way to check who votes in each state? Maybe they even register under two different names since they have two different addresses. James K Smith in Florida and Jimmy Smith in New York.
We need a federal election ID number like a credit card number. It should get listed on the internet in a sortable database as soon as it is used to vote and could not be used again for that election. Something like the purple thumb in Iraq.
But what you suggest would put an end to the Rat Party so we could never do that!