Donald Trump's tariff threats have rattled foreign businesses and governments, with many fearing it could signal the opening salvo of an all-out trade war when he returns to the White House next year. The US trade deficit with Vietnam has widened in recent years on a surge in goods imports.

Donald Trump's tariff threats have rattled foreign businesses and governments, with many fearing it could signal the opening salvo of an all-out trade war when he returns to the White House next year. The US trade deficit with Vietnam has widened in recent years on a surge in goods imports.