Throughout Trump’s campaign he repeatedly promised that “we” would build a wall and that Mexico would pay for it. The details of that boast were conveniently omitted. But class is now in session and the homework is due, so at long last we have been made privy to his “secret” method of getting Mexico to pay for this wall: tariffs. Trump plans on imposing a 20% tariff on imported Mexican goods coming into the US. The proceeds are earmarked for paying for said wall. There’s just one problem with this little scheme of course: it won’t work, or at least not the way Trump imagines.