U.S.-Canada trade war set to hit hard in midterm battleground states The Washington PostTensions simmer on US-Canada border for two towns relying on each other The GuardianCanadian boycott of U.S. products pushes grocers to adapt, explore new supply sources The Detroit NewsA Hostile Trump Reopens Old Wounds in the U.S.-Canada Relationship The New York TimesWhy Canada? America’s northern neighbor seems an unlikely target for a trade war AP News