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How Trump will get his 'border tax'

President Donald Trump needs Congressional action to help push his agenda on tax cuts, infrastructure spending, Obamacare repeal and many other campaign promises. But on trade, Trump can do quite a lot on his own—and he seems poised to act.

Trump has already pulled the United States out of the Trans Pacific Partnership, negotiated under President Barack Obama, which would have bound the United States and 11 other nations in a new trade pact. More importantly, he recently told a gathering of CEOs he would impose “very major” tariffs on companies that move operations out of the United States. That follows other threats to impose new tariffs of 35% or more to punish companies that build products outside the United States, for sale inside the country. Examples:

On some issues, Trump’s bark is worse than his bite. But on tariffs and other matters relating to trade, Trump can largely do what he wants, without any new legislation or permission from anybody. “These powers have been granted to the president by Congress over the last 100 years, in multiple statutes,” says trade expert Gary Hufbauer of the Peterson Institute for International Economics. “Can it be challenged in court? Not successfully, in my view.”

What Trump can and can’t do

Trade laws can be interpreted as allowing the president to impose tariffs, which Trump calls border taxes, on just about any product he chooses. He could even single out individual products made by companies he considers particularly un-American—such as a particular automobile made in Mexico—using detailed tariff schedules for imports and identifying information that would only apply to the product Trump chose to target.

Trump can’t slap tariffs on products imported from Mexico (or Canada) right away, because of the North American Free Trade Agreement, which eliminates tariffs. But he can withdraw the United States from NAFTA by merely notifying the other two signatory nations that he intends to do so; withdrawal would become effective six months later. At that point, Trump would be able to impose tariffs.