President Donald Trump's new tariff orders against Canada, Mexico and China all contain clauses suspending a duty-free exemption for low-value shipments below $800 that is widely seen as a loophole that has allowed shipments of fentanyl and its precursor chemicals into the United States.

President Trump has threatened to impose tariffs on Canada over drug trafficking, equating it with Mexico. U.S. government reports do not support the claim.

On Saturday, Trump signed an order imposing substantial tariffs on imports from Canada, Mexico, and China. In response, China’s commerce ministry announced it would file a complaint with the World Trade Organization and “take corresponding countermeasures,” though details were not provided.

U.S. President Donald Trump on Saturday ordered 25% tariffs on Canadian and Mexican imports and 10% on goods from China starting on Tuesday and declared that they would remain in place until a national emergency over the drug fentanyl and illegal immigration to the U.

Trump knows the United States has more leverage over its neighbors than they do over his country. But exploiting that position of strength could cause a historic rupture.

President Donald Trump’s new tariffs on imports from Canada, Mexico, and China have triggered swift retaliation. Canada announced a 25% tariff on $106 billion in U.S. goods, while Mexico plans unspecified countermeasures. China will file a lawsuit with the World Trade Organization and warned of “necessary countermeasures.”

China's government on Sunday denounced the Trump administration's imposition of a long-threatened 10% tariff on Chinese imports while leaving the door open for talks with the U.S. that could avoid a deepening conflict.

WASHINGTON (AP) — President Donald Trump on Saturday signed an order to impose stiff tariffs on imports from Mexico, Canada and China, drawing swift retaliation and an undeniable sense of betrayal from the country’s North American neighbors as a trade war erupted among the longtime allies.

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The move likely will trigger retaliation and risk igniting a trade war that could cause broad economic disruption for all countries involved.