Major economic war averted as U.S., Mexico strike deal Mexico has agreed to U.S. demands that it tighten its borders to stop the flow of illegal Central American immigrants from coming into the U.S. through Mexico. The deal spares Mexico from having to pay steep tariffs that were to go into effect next week. Those tariffs raised fears that they could cripple some U.S. businesses and raise prices for American consumers on everything from cars to produce. Weijia Jiang reports from the White House.