President Donald Trump's tariffs and comments about turning Canada into the 51st state have tested U.S. relations with the country. One example is the deterioration of longstanding bonds between Detroit, Michigan and its neighbor across the river, Windsor, Ontario.

NPR's Don Gonyea is a Detroit native and current resident of the city. He's had a front row view to changing attitudes between the two populations who have long enjoyed a very friendly, symbiotic relationship.

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