When Jim Allen, the elections director for Delaware County, Pennsylvania, recently ran a training session for poll workers, he began a conversation about a topic he’d never previously had to address during training: prediction markets. “There was one person who stood up, and they said, ‘Well, what if we just want to make a minor bet on what turnout will be, that’ll keep things interesting?’ And we said: ‘No, this is all bad,’” Allen, who oversees 383 precincts, recounts.