President Donald Trump has taken executive action to impose new tariffs on imports from Canada, China and Mexico. The move fulfills campaign promises but also sparked retaliatory moves that could signal an extended trade war with key trading partners and,

China chose swift retaliation for trade measures in the first Trump administration, but that led to an upward spiral of trade measures and much broader tariffs.

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.