Mexican President Claudia Sheinbaum said Monday that President Trump agreed to delay tariffs on her country by one month after the pair discussed additional border measures.

Ms. Sheinbaum, writing on X, said Mexico agreed to reinforce the northern border with 10,000 members of the National Guard to prevent drug trafficking, particularly fentanyl, from Mexico to the United States.

In exchange, the United States is expected to crack down on the flow of high-powered weapons from the U.S. to Mexico.

Mr. Trump confirmed the deal on Truth Social. He said Mexican soldiers will focus on fentanyl and illegal immigration and there will be further negotiations headed by Secretary of State Marco Rubio, Treasury Scott Bessent and Secretary of Commerce Howard Lutnick and “high-level Representatives of Mexico.”

“I look forward to participating in those negotiations, with President Sheinbaum, as we attempt to achieve a ‘deal’ between our two Countries,” Mr. Trump wrote. 

The agreement is a major development in the emerging North American trade war.

Mr. Trump announced he planned to impose 25% tariffs on goods from Canada and Mexico, starting on Tuesday, though leaders are discussing policy changes.

The U.S. president is scheduled to speak to Canadian Prime Minister Justin Trudeau on Monday afternoon.

• Tom Howell Jr. can be reached at thowell@washingtontimes.com.