Trump's cluelessness on trade is really hurting America, John Oliver says. Oliver's tutorial probably won't fix that.

"Trade is a subject on which our current president considers himself particularly expert," John Oliver said on Sunday's Last Week Tonight. The problem is, President Trump "seems genuinely confused" by the basics of trade economics, including tariffs and trade deficits, he said, succinctly explaining both concepts for the edification of viewers and in case a certain president of the United States was hate-watching.

To be fair, trade is "one of the most complicated issues there is, technically, politically, and emotionally," Oliver said, but Trump gets almost everything backwards. "The overwhelming consensus among economists is that trade between countries, generally speaking, can create jobs, lower costs, and be a net benefit to both nations," he said. "Essentially, think of trade like sex: If you're doing it right, it can be good for both partners — though the odds of that happening plummet as soon as Donald Trump gets involved." For example, Trump's tariffs may create 26,280 steel and aluminum jobs, according to one estimate, and eliminate 432,747 U.S. jobs elsewhere.

Unfortunately, Trump is listening to the one economist who agrees with him, Peter Navarro, Oliver said. "We're engaged in an escalating trade war that almost no legitimate economist supports, led by a man who honestly doesn't seem to fully understand the mechanics of what he's doing, getting advice from the human equivalent of an all-caps email from your uncle. And the crazy thing is, the effect of all this is the exact opposite of what Trump says he wants. Because if you want to create jobs, you don't do that by cutting off American companies' markets and suppliers, and if you want to curb the abuses of countries like China, you don't do that by pissing off the leaders of every other nation on Earth." He made a short, over-the-top, Navarro-style film to explain trade to Trump, who probably won't see it. You, however, can watch and learn below. Peter Weber

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