What to know about exit polls and how they’ve changed for this year’s elections

For decades, Americans have relied on exit polls to illuminate the story of what happened on election night. By gathering opinions from voters largely after they’ve cast their ballots, exit polls fill in the details that our secret-ballot elections otherwise leave impossible to know.

​ For decades, Americans have relied on exit polls to illuminate the story of what happened on election night. By gathering opinions from voters largely after they’ve cast their ballots, exit polls fill in the details that our secret-ballot elections otherwise leave impossible to know. Read More Breaking News, Latest News and Videos | CNN