This is part 2 of a two-part MIT News series on voting research and the 2020 election. Part 1 focuses on shifts in post-Election Day vote tallies. In elections, every vote counts. Or should count. But a new study by an MIT professor indicates that in the 2016 U.S. general election, 4 percent of all mail-in ballots were not counted — about 1.4 million votes, or 1 percent of all votes cast, signaling a significant problem that could grow in 2020. The study quantifies the range of reasons for this,…
