John Weekes comments in Bloomberg on what's changed about Canada/U.S. trade since NAFTA came into effect in 1994 that requires possible changes to the rules. John says that when it comes to rules of origin, there have been important changes in the way that companies source products. John also says there are a lot of things that didn’t even exist when NAFTA was negotiated, such as electronic commerce. What Refashioning an Iconic 90s Trade Deal May Look Like