In the rush to replace insecure, unreliable electronic voting machines after Russia’s interference in the 2016 U.S. presidential race, state and local officials have scrambled to acquire more trustworthy equipment for this year’s election, when U.S. intelligence agencies fear even worse problems. But instead of choosing simple, hand-marked paper ballots that are most resistant to tampering because paper cannot be hacked, many are opting for pricier technology that computer security experts consider almost as risky as earlier discredited electronic systems. Called ballot-marking devices, the machines have touchscreens for registering voter choice.