President Trump vowed to aid entrepreneurs by reducing taxes and slicing red tape. But some owners say other policies have put them at a disadvantage.

© Rachel Woolf for The New York Times

Swiss companies bemoan the loss of a reliable partner, and called the 32 percent tariff “incomprehensible.”

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The loophole has allowed retailers to send goods from China directly to U.S. shoppers without paying tariffs. Closing it could raise consumer prices.

Business owners told The Times that President Trump’s tariffs could lead to higher costs and expressed frustration at the sudden uncertainty about policy.