The stakes are high when a major civic exercise involves a large population, new technology that has not been thoroughly tested and an entire country waiting on the results. Just ask the organizers of the Iowa caucuses, which offered a cautionary tale on the technological woes that could befall a big political event. Some observers worry that this year’s...

By 2060, almost a quarter of all U.S. residents will be over age 65, and life expectancy will reach an all-time high of 85 years.