The U.S., Canada and Mexico reached a deal on a successor to the 24-year-old Nafta, capping more than 13 months of negotiations and overcoming major sticking points from Canadian dairy market access to minimum wage requirements for automobile production. Here are the major differences between the old deal and the new one, called the U.S.-Mexico-Canada Agreement, or USMCA, which President Donald Trump hailed Monday as a historic achievement.