New data makes it clear: Nonvoters handed Trump the presidency

Most of our assessments of the electorate in 2016 are dependent on estimates. Polling before the election that suggested where people were leaning; exit polling after the fact that gives us some sense of who actually turned out. When more than 137 million people vote, understanding exactly who they were and why they voted the way they did necessarily involves some guesswork.

(Read more in Washington Post)