The Polling Conundrum

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Several polls released before the California primary suggested Bernie Sanders and Hillary Clinton were in a tight race, but those polls were off -- way off. What happened?

Three polls conducted at the end of May and early June showed Hillary Clinton and Bernie Sanders in a tight race, within two points of each other. But once California's primary wrapped, Clinton won by nearly 13 points. What happened in the polling and why was it so far off the mark?

Credits

Guests:

Host:

Warren Olney

Producer:

Jennifer Wolfe