President Donald Trump posted letters to the leaders of Mexico and the European Union, saying they had not done enough to head off the new tariffs.

President Trump threatened a significant tariff hike on the European Union and Mexico, two of the largest U.S. trade partners, on Saturday. NBC News’ Yamiche Alcindor has more.

Trump and his aides have repeatedly shifted their stance on tariffs since the president’s “Liberation Day” announcement.

The pause on the biggest of Trump's tariffs won't end this week, but the president continues to pledge steep new duties against major countries.

Plus, the Justice Department has subpoenaed 20 doctors and clinics involved in “performing transgender medical procedures on children.”

President Trump warns Canadian Prime Minister Mark Carney of a new 35% tariff on Canadian imports if the country doesn't address fentanyl trafficking and existing trade disputes.

Economists and investors are left guessing by President Donald Trump’s tariff agenda as he grants extensions then threatens higher tariffs in letters to trading partners. It remains to be

Trump's tariffs have led some companies to announce that they plan to raise prices.Even before his so-called "Liberation Day," companies warned they would pass costs on to shoppers.BI is keeping track of companies that said they'd raise prices due to tariffs — and those who already have.