The tariffs are not happening immediately — at least for Mexico and Canada. But with China's tariff still in place, the country decided to respond on Tuesday.

Both Canadian Prime Minister Trudeau and Mexican President Sheinbaum said they had agreed to bolster border enforcement efforts in response to Trump's demand to crack down on immigration and drug smuggling.

U.S. tariffs of 10% on Chinese imports came into effect on Tuesday, risking a renewed trade war between the world's top two economies as President Donald Trumppunishes China for not halting the flow of illicit drugs.