Pollster explains why U.S. polling can be so unreliable in key battleground states | TREND LINE

The U.S. midterms are rapidly approaching so CTVNews.ca's Michael Sittle and Nanos Research's Nik Nanos look at what a will change for U.S. President Joe Biden if Republicans take control of the House of Representatives.

Nik also explains some key differences in the way that polling in Canada and the United States is conducted — and how that has lead to some significant misfires and blown calls in American elections.

Watch the full episode: www.youtube.com/watch?v=82sAuMc9Vt0

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