European Union

After recessions, fire and flood, who needs a trade war?

After recessions, fire and flood, who needs a trade war?

Since that long-ago summer day when Joseph Kavanagh, an Irish immigrant and skilled coppersmith, set up shop in Baltimore, the company has survived 23 recessions, five financial panics, a destructive flood and a devastating fire, the Great Depression and the Great Recession. Joe Kavanagh’s descendants hope Donald J. Trump’s trade war does not end the family business at five generations.

Things have been tough for the Kavanaghs in recent years. The company long ago morphed into a bender and roller of pipe made of steel, aluminum and other alloys. It’s a small shop in Dundalk now,...

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