The Globe and Mail reports in its Wednesday edition that Donald Trump has promised to launch a Supreme Court appeal to defend his use of tariffs, warning that constraining his ability to tax imports would destroy the United States. The Globe's Nathan VanderKlippe writes that the Trump administration has now lost two court cases in its bid to defend its use of tariffs under the International Emergency Economic Powers Act, or IEEPA. Rulings by the U.S. Court of Appeals and Court of International Trade have held that the White House imposition of those tariffs is illegal. The latest decision, on Friday, was stayed until Oct. 14 to allow time for an appeal. If his administration does not prevail before the Supreme Court, it could be forced to repay tens of billions of dollars in tariffs to U.S. importers of goods from Canada and numerous other countries. "If you took away tariffs, we could end up being a third-world country. That's how big" the ruling will be, Mr. Trump wrote Tuesday. Opponents say he has exceeded his authority as President, pointing to the U.S. Constitution, which gives Congress the exclusive power to tax and tariff. The legal challenge has no bearing on the more punishing tariffs on steel, aluminum and cars.