WASHINGTON — President Donald Trump says he plans to impose tariffs on Canada and Mexico starting next Tuesday, in addition to doubling the 10% universal tariff charged on imports from China.

Trump had earlier set the tariffs on Canadian and Mexican imports at 25%.

Posting on Truth Social on Thursday, Trump said that illicit drugs such as fentanyl are being smuggled into the United States at "unacceptable levels" and that import taxes would force other countries to crackdown on the trafficking.

"We cannot allow this scourge to continue to harm the USA, and therefore, until it stops, or is seriously limited, the proposed TARIFFS scheduled to go into effect on MARCH FOURTH will, indeed, go into effect, as scheduled," the Republican president wrote. "China will likewise be charged an additional 10% Tariff on that date."

Trump initially planned to impose the tariffs on Canada and Mexico on Feb. 4, but he agreed to pause them for 30 days after the leaders of both countries agreed to increase security at their borders with the U.S.

The prospect of escalating tariffs has already thrown the global economy into turmoil — with consumers expressing fears about inflation worsening and the auto sector possibly suffering if America's two largest trading partners in Canada and Mexico are slapped with taxes.

The potential for higher prices and slower growth could create political blowback for Trump, who promised voters in last year's presidential election that he could quickly lower the inflation rate, which jumped during President Joe Biden's term. But Trump also campaigned on imposing broad tariffs and sweeping tariffs, which he plans to launch on April 2 by resetting tariffs to match the taxes that he determines are charged by other countries on American goods.

"The April Second Reciprocal Tariff date will remain in full force and effect," Trump said as part of his Thursday social media post.

Trump indicated Wednesday that European countries would face a 25% tariff. He also wants separate tariffs on autos, computer chips and pharmaceutical drugs that would be levied in addition to the reciprocal tariffs.