Washington. US President Donald Trump held off Monday on his tariff threats against Mexico for one month of further negotiations after Mexican President Claudia Sheinbaum agreed to send 10,000 members of her country's national guard to the border to address drug trafficking.

Trump’s tariffs against Canada and China were still slated to go into effect Tuesday, but uncertainty remained about the durability of any deals and whether the tariffs were a harbinger of a broader trade war, as Trump has promised more import taxes to come.

A senior Canadian official said Canada was not confident it could avoid the looming tariffs as Mexico did. That’s because Canada feels as if the administration is shifting its requests of Canada more than it did for Mexico. The official spoke on condition of anonymity as they were not authorized to speak publicly.

Asked Monday afternoon what Canada could offer in talks to prevent tariffs, Trump told reporters gathered in the Oval Office: “I don't know.”

He also indicated that more import taxes could be coming against China: "If we can’t make a deal with China, then the tariffs will be very, very substantial.”

The US and Mexican leaders announced the pause after what Trump described on social media as a “very friendly conversation,” and he said he looked forward to the upcoming talks.

Trump said the talks would be headed by Secretary of State Marco Rubio, Secretary of 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,” the president said.

As a condition ahead of the talks, Sheinbaum laid out changes in border policies, and Trump confirmed Mexico's deployment of troops.

“Mexico will reinforce the northern border with 10,000 members of the National Guard immediately, to stop drug trafficking from Mexico to the United States, in particular fentanyl," Sheinbaum posted on X. “The United States commits to work to stop the trafficking of high-powered weapons to Mexico."

Trump posted earlier on social media that he spoke Monday morning with Canadian Prime Minister Justin Trudeau and would speak with him again at 3 p.m. Both Canada and Mexico had plans to levy their own tariffs in response to US actions, but Mexico is holding off for the moment.

Trump used his social media post to repeat his complaints that Canada has been uncooperative, despite decades of friendship and partnerships that range from World War II to the response to the 9/11 terrorist attacks.

“Canada doesn’t even allow U.S. Banks to open or do business there,” Trump posted. “What’s that all about? Many such things, but it’s also a DRUG WAR, and hundreds of thousands of people have died in the US from drugs pouring through the Borders of Mexico and Canada.”