 They go find honest work. Lopez Obrador also said the economies of Mexico and the United States are too intertwined to put in place protectionist policies. For example, he said, if cars were built in the U.S. instead of Mexico, they would cost over $10,000 more. What Trump proposes, says Lopez Obrador, is impossible. It would hurt the U.S. and hurt Mexico. Adel Pralta, NPR News, Mexico City.