Politics Friday: Should we stop trusting pre-election polling?

Volunteer Rebecca McKay observes the polling site from across the parking lot at the Southside Boys & Girls Club on Tuesday in St. Cloud. McKay is a volunteer with Election Protection, a non-partisan coalition of voting rights activists.
Paul Middlestaedt for MPR News
Is there really such a thing as a "shy Trump voter"? Who is contacted to take part in pre-election polls? And are those polls reliable or not?
In an election week edition of Politics Friday, MPR News politics editor Mike Mulcahy talks all things polling with APM Research Lab managing partner Craig Helmstetter.
Mulcahy is also joined by two local journalists to unpack this busy political week.
Guest:
Craig Helmstetter is the managing partner at APM Research Lab.
Tim Pugmire covers politics for MPR News.
Briana Bierschbach covers politics for the Star Tribune.
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