Mr. Bivens supports Mr. Trump’s efforts to negotiate better trade deals. But his business could suffer if American bourbon distilleries, which rely heavily on corn, have to scale back orders for his crop. He is also facing pressure from other directions: On Friday, China announced new retaliatory tariffs on soybeans, which Mr. Bivens exports.

Mr. Trump’s sweeping tariffs have kicked off a trade war that many American businesses long feared. The European Union announced plans to impose 50 percent tariffs on all American whiskey in response to Mr. Trump’s steel and aluminum tariffs, prompting the president to threaten 200 percent tariffs on European wine and other alcohol if the bloc followed through. Canada has also imposed 25 percent tariffs on American whiskey, and in some provinces, brands including Jack Daniel’s have been pulled from store shelves.

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