Trump’s threat to override new NAFTA with tariff on Mexican cars could undermine ratification

Washington (CNN)In walking back his threat to close the US-Mexico border, President Donald Trump said Friday he would override his pending US-Mexico-Canada Agreement to impose a 25% tariff on cars made south of the border if Mexico doesn’t help stem the flow of undocumented immigrants into the United States. The statement could undermine the ratification of the trade deal, which is meant to replace the North American Free Trade Agreement. Trump has called the original pact one of the worst deals he’s ever seen, and has touted the USCMA as a shining achievement of his administration. It would keep vehicles made within North America free from tariffs, as long as most of its parts were made inside the three countries …