Mel Gutherie, president of Gutherie Lumber, walks among Canadian lumber products on Aug. 25 in Livonia, Mich.

Mel Gutherie, president of Gutherie Lumber, walks among Canadian lumber products on Aug. 25 in Livonia, Mich.

President Trump’s tariff standoff with Canada is rankling some key voters ahead of this year’s midterm elections.

(Image credit: Paul Sancya)