He's been president of the United States for less than two months, but Donald Trump has already rolled out hefty import taxes on his biggest trading partners. Here's a timeline of the trade war that started during his first term in office.

Canada and Mexico A 25% import tariff on goods from Mexico and Canada took effect March 4, with an exception for energy products and potash, which received a 10% tariff. The next day, the Trump administration suspended those tariffs until April 2 for autos eligible for duty-free trade under the U.