The tariffs have touched off a range of emotions along the world’s longest international border, where residents and industries are closely intertwined. Ranchers in Canada rely on American companies for farm equipment, and export cattle and hogs to U.S. meat processors. U.S. consumers enjoy thousands of gallons of Canadian maple syrup each year. Canadian dogs and cats dine on U.S.-made pet food.

The trade dispute will have far-reaching spillover effects, from price increases and paperwork backlogs to longer wait times at the U.S.-Canada border for both people and products, said Laurie Trautman, director of the Border Policy Research Institute at Western Washington University.

“These industries on both sides are built up out of a cross-border relationship, and disruptions will play out on both sides,” Trautman said.

The Associated Press wanted to know what residents and businesses were thinking along the border that Reagan vowed would remain unburdened by an “invisible barrier of economic suspicion and fear.” Here’s what they said:

• Skagway, Alaska-Whitehorse, Yukon
• Point Roberts, Washington-Delta, British Columbia
• Billings, Montana-Alberta
• Detroit-Windsor, Ontario
• Buffalo, New York-Ontario
• Cutler, Maine-New Brunswick