President Trump moved to impose stiff tariffs on Mexico and Canada, whose leaders swiftly responded with their own levies, and accused Trump of starting a trade war that would debilitate all three economies.

Hours after President Trump signed the order Saturday, Mexican President Claudia Sheinbaum ordered retaliatory tariffs. Here's what to know.

Canada will retaliate against President Donald Trump'snew tariffs with 25% levies on a raft of U.S. imports, Prime Minister Justin Trudeau said on Saturday, warning Americans that Trump's actions would have real consequences for them.

There is anxiousness and uncertainty of what exactly the new tariffs will be and how they could impact the economy of El Paso-Juárez Borderland, which relies on trade between the neighboring nations. Mexico is the largest international trading partner for the United States and the state of Texas.

Trump says he will levy a 25% import tax on all steel and aluminium products entering the US from 12 March, meaning both sides have a month to negotiate. Canada is the top exporter of both metals to the US.

"It's clear to us that just the threat of tariffs are having impacts here in Canada, and they are already driving up costs for US consumers if tariffs actually show up and come in

Canadian Prime Minister Justin Trudeau said Canada and the U.S. should be working together but that the country will stand up for itself if needbe.