President Trump offered his own solution to prevent Russia meddling in the 2018 midterm elections saying, "it's called paper." He suggested a "paper backup system" for voting when asked about how to combat Russia's meddling at a joint press conference with Prime Minister Stefan Löfven of Sweden.
The reality: Trump isn't wrong that many states have a paper trail of votes — but not every state has a paper trail of votes right now. That means they are unable to verify with a 100% guarantee that the result of an election is exactly how voters cast their ballots. 5 states lack a paper trail in their voting systems and use solely electronic voting machines.