President Trump's imposition of blanket 25% tariffs on all goods imported from Canada and Mexico drew swift vows of retaliation from the United States' immediate neighbors on Tuesday. China, which was hit with a second 10% tariff on U.

U.S. President Donald Trump's long-threatened tariffs are here, plunging the country into an escalating trade war with China, Canada and Mexico.

China will impose additional tariffs of up to 15% on some U.S. goods, its government said, while Canada vowed tariffs of up to 25% after new U.S. tariffs on both countries took effect.