“The president will be implementing tomorrow a 25% tariff on Mexico, 25% tariffs on Canada, and a 10% tariff on China for the illegal fentanyl that they have sourced and allowed to distribute into our country, which has killed tens of millions of Americans,” press secretary Karoline Leavitt said Friday. “These are promises made and promises kept by the president.”

Trump campaigned heavily on tariffs and threatened to implement them against Canada and Mexico on Inauguration Day, which was later pushed back to Saturday. The stated reason is that illegal drugs and migrants have been allowed to pour across the northern and southern borders, and Trump has not been satisfied with results after meeting with the presidents of those two countries in recent weeks.

China’s tariffs, while separate, are solely for what the Trump administration says is its role in trafficking fentanyl.

Ahead of the afternoon press briefing, news circulated that Trump would delay the tariffs again to March 1 and that there would be a process for the countries to seek exemptions. Leavitt said those reports are false.

“I was just with the president in the Oval Office, and I can confirm that tomorrow, the Feb. 1 deadline that President Trump put into place,” Leavitt said.

Leavitt did not have anything to add when asked about possible exemptions for oil imports but said details of the tariffs would be publicly available on Saturday.

Trump critics say the tariffs could reignite inflation, but Leavitt argued that won’t be the case, pointing to an average 1.9% inflation rate during his first term.

“When President Trump left office, inflation was 1.4%,” she said. “President Trump is going to do everything he possibly can to cut the inflation crisis that the previous administration imposed on the American people. And he will continue to effectively utilize tariffs.”

She accused the media of looking at the issue “in a microscope” rather than in full context, saying Trump’s energy policies and other measures will grow the economy while keeping inflation low.

Trump often uses tariffs as a threat in order to try to implement changes to other policies, recently promising import duties on Colombia if that country would not agree to repatriate citizens who illegally entered the U.S. Colombia agreed to Trump’s terms within hours.

The press secretary did not say how long the tariffs will be in place or what it will take for the three countries to remove them, but she reiterated that each has played a role in fentanyl and illegal immigrants flooding the United States.

Canadian Prime Minister Justin Trudeau said he is “ready with a response” to tariffs if Trump proceeds with them.