President Donald Trump confirmed Thursday that his proposed tariffs on Mexico and Canada will take effect on March 4, reversing a one-month pause. He also announced an additional 10 tariff on Chinese imports, raising total U.S. tariffs on Chinese goods to 20. Trump linked the Mexico and Canada tariffs to drug trafficking concerns but did not provide evidence. Trump has made tariffs central to his second-term agenda, positioning them as a revenue source and a negotiating tool.