The tariffs have touched off a range of emotions along the world's longest international border, where residents and industries are closely intertwined.

The 25% tariff on most imported Canadian goods that President Donald Trump’s plans to impose Tuesday has touched off a range of emotions along the world’s longest international border

Trucks enter into the United States from Ontario, Canada, across the Ambassador Bridge on Feb. 3 in Detroit.

New tariffs imposed by the United States on Canadian imports have ignited concern among communities along the border, where economic and social ties run deep. With a25% tariff on most Canadian goods and a 10% tariff on oil and gas,