https://techcrunch.com/2020/02/04/iowa-caucus-app-disaster/

A smartphone app designed to help announce the results of the Iowa caucus ended up crapping out and causing a massive delay by almost an entire day.

The Iowa caucus traditionally uses gatherings of people in counties across the state to determine which candidates they want to back for the presidential nomination. They use a paper trail as a way of auditing the results. While Iowa may have only 41 delegates needed out of 1,990 to nominate a Democratic candidate, the results are nevertheless seen as a nationwide barometer for who might be named to the ticket.