Think your midterm vote doesn’t matter? History has a warning.

Midterm elections are where people convince themselves the stakes are lower. There is no presidential race at the top of the ballot, turnout drops, and millions of Americans decide they can afford to sit one out. But history has a way of punishing that assumption, because enormous amounts of political power can turn on margins so small they barely seem real. In 1916, America ALMOST elected Republican Charles Evans Hughes as President. Instead, his razor-thin defeat gave Woodrow Wilson a second term and, with it, one of the darkest four-year periods in U.S. history. Remarkably, it all came down to...