Investing.com -The clock is tickingThe 3 sides have set an ambitious timetable with the goal of wrapping up talks by early next year.Eliminating the deficitThe Trump administration has made eliminating the more than $60bn trade deficit with Mexico a top priority.Rules of originThe U.S. may insist on new restrictions around regional-content requirements, a red line for Mexico.Higher wages in Mexico The US wants new labor rules to force wages to go up in Mexico, reducing its cost advantage.A dispute over disputesThe US wants to scrap the Chapter 19 trade dispute mechanism, a red line for Canada.Political riskEven if a deal is struck, it is unclear if it could survive a vote in the US Congress