President Donald Trump has signed an order to impose stiff tariffs on imports from Mexico, Canada and China, drawing swift retaliation from the U.S.’s North American neighbors in an emerging trade war.

Trump posted on social media that the tariffs were necessary “to protect Americans,” pressing the three nations to do more to curb the manufacture and export of illicit fentanyl and for Canada and

In Trump’s view, the 25% tariffs against the two North American allies and a 10% tax on imports from Washington’s chief economic rival are a way for the United States to throw around its financial