Abdul El-Sayed’s narrow win over Rep. Haley Stevens in Michigan’s Democratic primary for U.S. Senate on Tuesday — despite polls showing he was leading by double-digits — has sparked questions about why polls got it so wrong, and whether they’re useful for anything.
Why did the polls miss so badly in Michigan?
Guests attend an election-night rally hosted by Abdul El-Sayed on Tuesday. (Scott Olson/Getty Images)
