President Donald Trump says Americans could feel "some pain" from the emerging trade war triggered by his tariffs against Canada, Mexico and China.

In 2019, Mexico avoided Trump’s tariff threat by adding immigration control to the responsibilities of its newly formed National Guard, but this time the accusation that Sheinbaum’s administration has alliances with criminal groups pushed her to punch back.

China's sharpest pushback on Sunday was over fentanyl, an area where the Biden administration had also been urging Beijing to crack down on shipments.

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.