Mexico's President-elect Andrés Manuel López Obrador said Tuesday President Trump's preferred acronym for the free trade agreement between the United States, Mexico and Canada, USMCA, is not "adequate" in Spanish. Lopez Obrador said in a tweet his chief trade negotiator, Jesús Seade, alerted him the USMCA acronym does not suit Mexican law, under which the trade pact would be a formal treaty, not an agreement. The USMCA -- short for United States-Mexico-Canada Agreement -- is set to replace the 25-year-old North American Free Trade Agreement (NAFTA), once ratified by the three countries' legislatures. In Spanish, NAFTA was known as TLCAN,...