President Donald Trump will implement sweeping tariffs on Saturday, the White House has confirmed.

“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.

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.

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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.