WASHINGTON, DC – Late last month, US President Donald Trump threatened to impose tariffs on imports from Mexico in ten days if it did not halt the flow of migrants from Central America. The tariffs would start at 5% and then increase by five percentage points monthly until reaching 25% in October. The announcement came as a shock, especially given that the United States and Mexico (plus Canada) had reached an agreement on a revised North American Free Trade Agreement just months earlier, at Trump’s insistence. Ratification of the new trade deal, the US-Mexico-Canada Agreement (USMCA), is now in jeopardy